202012202112021 has 24 divisors (see below), whose sum is σ = 341614130405184. Its totient is φ = 112620042987840.

The previous prime is 202012202112013. The next prime is 202012202112037. The reversal of 202012202112021 is 120211202210202.

It is a happy number.

202012202112021 is a `hidden beast` number, since 20 + 201 + 220 + 21 + 1 + 202 + 1 = 666.

It is not a de Polignac number, because 202012202112021 - 2³ = 202012202112013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202012202111985 and 202012202112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202012202112221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39104179011 + ... + 39104184176.

It is an arithmetic number, because the mean of its divisors is an integer number (14233922100216).

Almost surely, 2^{202012202112021} is an apocalyptic number.

202012202112021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202012202112021 is a deficient number, since it is larger than the sum of its proper divisors (139601928293163).

202012202112021 is a wasteful number, since it uses less digits than its factorization.

202012202112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78208363241 (or 78208363238 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 202012202112021 its reverse (120211202210202), we get a palindrome (322223404322223).

The spelling of 202012202112021 in words is "two hundred two trillion, twelve billion, two hundred two million, one hundred twelve thousand, twenty-one".