21310313231100 has 36 divisors (see below), whose sum is σ = 61657839616184. Its totient is φ = 5682750194880.

The previous prime is 21310313231069. The next prime is 21310313231131. The reversal of 21310313231100 is 113231301312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21310313231069) and next prime (21310313231131).

It is a congruent number.

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, 35517188419 + ... + 35517189018.

Almost surely, 2^{21310313231100} is an apocalyptic number.

21310313231100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310313231100 is an abundant number, since it is smaller than the sum of its proper divisors (40347526385084).

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

21310313231100 is a wasteful number, since it uses less digits than its factorization.

21310313231100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71034377454 (or 71034377447 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21310313231100 its reverse (113231301312), we get a palindrome (21423544532412).

The spelling of 21310313231100 in words is "twenty-one trillion, three hundred ten billion, three hundred thirteen million, two hundred thirty-one thousand, one hundred".