202121002120100 has 36 divisors (see below), whose sum is σ = 501260085259584. Its totient is φ = 69298629298080.

The previous prime is 202121002120087. The next prime is 202121002120123. The reversal of 202121002120100 is 1021200121202.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144372143672 + ... + 144372145071.

Almost surely, 2^{202121002120100} is an apocalyptic number.

202121002120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121002120100 is an abundant number, since it is smaller than the sum of its proper divisors (299139083139484).

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

202121002120100 is a wasteful number, since it uses less digits than its factorization.

202121002120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288744288764 (or 288744288757 counting only the distinct ones).

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

Adding to 202121002120100 its reverse (1021200121202), we get a palindrome (203142202241302).

The spelling of 202121002120100 in words is "two hundred two trillion, one hundred twenty-one billion, two million, one hundred twenty thousand, one hundred".