202102230111021 has 96 divisors (see below), whose sum is σ = 309893017674240. Its totient is φ = 126751472289792.

The previous prime is 202102230110993. The next prime is 202102230111079. The reversal of 202102230111021 is 120111032201202.

202102230111021 is a `hidden beast` number, since 2 + 0 + 210 + 22 + 301 + 110 + 21 = 666.

It is not a de Polignac number, because 202102230111021 - 2²³ = 202102221722413 is a prime.

It is a super-2 number, since 2×202102230111021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202102230110985 and 202102230111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102230110021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1289505100 + ... + 1289661818.

It is an arithmetic number, because the mean of its divisors is an integer number (3228052267440).

Almost surely, 2^{202102230111021} is an apocalyptic number.

It is an amenable number.

202102230111021 is a deficient number, since it is larger than the sum of its proper divisors (107790787563219).

202102230111021 is a wasteful number, since it uses less digits than its factorization.

202102230111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157715 (or 157712 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 202102230111021 its reverse (120111032201202), we get a palindrome (322213262312223).

The spelling of 202102230111021 in words is "two hundred two trillion, one hundred two billion, two hundred thirty million, one hundred eleven thousand, twenty-one".