202101120210021 has 32 divisors (see below), whose sum is σ = 273083341230336. Its totient is φ = 132941139840000.

The previous prime is 202101120210019. The next prime is 202101120210023. The reversal of 202101120210021 is 120012021101202.

It is an interprime number because it is at equal distance from previous prime (202101120210019) and next prime (202101120210023).

It is not a de Polignac number, because 202101120210021 - 2¹ = 202101120210019 is a prime.

It is a super-2 number, since 2×202101120210021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101120210023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46998621 + ... + 51118221.

It is an arithmetic number, because the mean of its divisors is an integer number (8533854413448).

Almost surely, 2^{202101120210021} is an apocalyptic number.

It is an amenable number.

202101120210021 is a deficient number, since it is larger than the sum of its proper divisors (70982221020315).

202101120210021 is a wasteful number, since it uses less digits than its factorization.

202101120210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4120493.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 202101120210021 its reverse (120012021101202), we get a palindrome (322113141311223).

The spelling of 202101120210021 in words is "two hundred two trillion, one hundred one billion, one hundred twenty million, two hundred ten thousand, twenty-one".