31131103021100 has 72 divisors (see below), whose sum is σ = 67760705620608. Its totient is φ = 12414436070400.

The previous prime is 31131103021093. The next prime is 31131103021129. The reversal of 31131103021100 is 112030113113.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 486292694 + ... + 486356706.

Almost surely, 2^{31131103021100} is an apocalyptic number.

It is an amenable number.

31131103021100 is an abundant number, since it is smaller than the sum of its proper divisors (36629602599508).

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

31131103021100 is a wasteful number, since it uses less digits than its factorization.

31131103021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78795 (or 78788 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31131103021100 its reverse (112030113113), we get a palindrome (31243133134213).

The spelling of 31131103021100 in words is "thirty-one trillion, one hundred thirty-one billion, one hundred three million, twenty-one thousand, one hundred".