CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Cash flows from operating activities:
Net income	$ 884,998	$ 411,706
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	315,912	179,557
Amortization of deferred contract acquisition costs	125,691	71,281
Gains on strategic investments, net	(154,497)	(2,538)
Depreciation and amortization	35,275	19,401
Provision for accounts receivable allowances	23,482	20,218
Non-cash operating lease cost	13,131	7,182
Charitable donation of common stock	0	23,312
Amortization on marketable securities	19,546	2,787
Other	2,127	930
Changes in operating assets and liabilities:
Accounts receivable	(108,541)	(190,117)
Prepaid expenses and other assets	(71,998)	(48,258)
Deferred contract acquisition costs	(165,305)	(266,294)
Accounts payable	12,062	8,773
Accrued expenses and other liabilities	171,914	203,919
Deferred revenue	304,513	633,600
Operating lease liabilities, net	(12,440)	(3,678)
Net cash provided by operating activities	1,395,870	1,071,781
Cash flows from investing activities:
Purchases of marketable securities	(3,446,313)	(1,016,109)
Maturities of marketable securities	1,047,545	406,607
Sales of marketable securities	281,582	36,897
Purchases of property and equipment	(111,816)	(58,517)
Purchases of strategic investments	(126,349)	(13,000)
Cash paid for acquisition, net of cash acquired	(2,121)	(26,486)
Purchase of intangible assets	(9,626)	(4,385)
Other	0	1,616
Net cash used in investing activities	(2,367,098)	(673,377)
Cash flows from financing activities:
Proceeds from issuance of common stock for employee stock purchase plan	37,846	20,760
Proceeds from employee equity transactions (remitted) to be remitted to employees and tax authorities, net	(28,342)	251,641
Proceeds from exercise of stock options	11,044	23,841
Other	337	0
Net cash provided by financing activities	20,885	296,242
Net (decrease) increase in cash, cash equivalents, and restricted cash	(950,343)	694,646
Cash, cash equivalents, and restricted cash – beginning of period	2,293,116	334,082
Cash, cash equivalents, and restricted cash – end of period	1,342,773	1,028,728
Reconciliation of cash, cash equivalents, and restricted cash within the condensed consolidated balance sheets to the amounts shown in the condensed consolidated statements of cash flows above:
Cash and cash equivalents	1,322,435	730,506
Restricted cash, current included in prepaid expenses and other current assets	20,041	296,007
Restricted cash, noncurrent included in other assets, noncurrent	297	2,215
Total cash, cash equivalents, and restricted cash	$ 1,342,773	$ 1,028,728