202121010122100 has 144 divisors (see below), whose sum is σ = 603302275849728. Its totient is φ = 52207040540160.

The previous prime is 202121010122089. The next prime is 202121010122117. The reversal of 202121010122100 is 1221010121202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 202121010122100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38352279 + ... + 43302878.

Almost surely, 2^{202121010122100} is an apocalyptic number.

202121010122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121010122100 is an abundant number, since it is smaller than the sum of its proper divisors (401181265727628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202121010122100 is a wasteful number, since it uses less digits than its factorization.

202121010122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81655434 (or 81655427 counting only the distinct ones).

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

Adding to 202121010122100 its reverse (1221010121202), we get a palindrome (203342020243302).

The spelling of 202121010122100 in words is "two hundred two trillion, one hundred twenty-one billion, ten million, one hundred twenty-two thousand, one hundred".