202112020001021 has 16 divisors (see below), whose sum is σ = 220236047923248. Its totient is φ = 184363218624000.

The previous prime is 202112020000963. The next prime is 202112020001039. The reversal of 202112020001021 is 120100020211202.

It can be written as a sum of positive squares in 8 ways, for example, as 23893658476996 + 178218361524025 = 4888114^2 + 13349845^2 .

It is a de Polignac number, because none of the positive numbers 2^k-202112020001021 is a prime.

It is a super-2 number, since 2×202112020001021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202112020000987 and 202112020001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112020003021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147042866 + ... + 148411011.

It is an arithmetic number, because the mean of its divisors is an integer number (13764752995203).

Almost surely, 2^{202112020001021} is an apocalyptic number.

It is an amenable number.

202112020001021 is a deficient number, since it is larger than the sum of its proper divisors (18124027922227).

202112020001021 is a wasteful number, since it uses less digits than its factorization.

202112020001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295454512.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202112020001021 its reverse (120100020211202), we get a palindrome (322212040212223).

The spelling of 202112020001021 in words is "two hundred two trillion, one hundred twelve billion, twenty million, one thousand, twenty-one".