21312131302110 has 64 divisors (see below), whose sum is σ = 56584936641024. Its totient is φ = 5093808585600.

The previous prime is 21312131302103. The next prime is 21312131302123. The reversal of 21312131302110 is 1120313121312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454780909 + ... + 454827768.

It is an arithmetic number, because the mean of its divisors is an integer number (884139635016).

Almost surely, 2^{21312131302110} is an apocalyptic number.

21312131302110 is an abundant number, since it is smaller than the sum of its proper divisors (35272805338914).

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

21312131302110 is a wasteful number, since it uses less digits than its factorization.

21312131302110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909608769.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21312131302110 its reverse (1120313121312), we get a palindrome (22432444423422).

The spelling of 21312131302110 in words is "twenty-one trillion, three hundred twelve billion, one hundred thirty-one million, three hundred two thousand, one hundred ten".