202121110010100 has 72 divisors (see below), whose sum is σ = 587742457422400. Its totient is φ = 53628113594880.

The previous prime is 202121110010093. The next prime is 202121110010117. The reversal of 202121110010100 is 1010011121202.

It is a super-2 number, since 2×202121110010100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1692746917 + ... + 1692866316.

Almost surely, 2^{202121110010100} is an apocalyptic number.

202121110010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121110010100 is an abundant number, since it is smaller than the sum of its proper divisors (385621347412300).

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

202121110010100 is a wasteful number, since it uses less digits than its factorization.

202121110010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385613449 (or 3385613442 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 202121110010100 its reverse (1010011121202), we get a palindrome (203131121131302).

The spelling of 202121110010100 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred ten million, ten thousand, one hundred".