21132100313212 has 24 divisors (see below), whose sum is σ = 42358330274400. Its totient is φ = 9036443781120.

The previous prime is 21132100313201. The next prime is 21132100313293. The reversal of 21132100313212 is 21231300123112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840430489 + ... + 840455632.

It is an arithmetic number, because the mean of its divisors is an integer number (1764930428100).

Almost surely, 2^{21132100313212} is an apocalyptic number.

It is an amenable number.

21132100313212 is an abundant number, since it is smaller than the sum of its proper divisors (21226229961188).

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

21132100313212 is a wasteful number, since it uses less digits than its factorization.

21132100313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680886581 (or 1680886579 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21132100313212 its reverse (21231300123112), we get a palindrome (42363400436324).

The spelling of 21132100313212 in words is "twenty-one trillion, one hundred thirty-two billion, one hundred million, three hundred thirteen thousand, two hundred twelve".