212121200211100 has 72 divisors (see below), whose sum is σ = 471030774545408. Its totient is φ = 82871204068800.

The previous prime is 212121200211073. The next prime is 212121200211121. The reversal of 212121200211100 is 1112002121212.

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, 87430597 + ... + 89824003.

Almost surely, 2^{212121200211100} is an apocalyptic number.

212121200211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121200211100 is an abundant number, since it is smaller than the sum of its proper divisors (258909574334308).

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

212121200211100 is a wasteful number, since it uses less digits than its factorization.

212121200211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414075 (or 2414068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212121200211100 its reverse (1112002121212), we get a palindrome (213233202332312).

The spelling of 212121200211100 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred million, two hundred eleven thousand, one hundred".