31312120120 has 64 divisors (see below), whose sum is σ = 74576700000. Its totient is φ = 11811706368.

The previous prime is 31312120109. The next prime is 31312120141. The reversal of 31312120120 is 2102121313.

It is a junction number, because it is equal to n+sod(n) for n = 31312120094 and 31312120103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263995 + ... + 363754.

Almost surely, 2^31312120120 is an apocalyptic number.

It is an amenable number.

31312120120 is an abundant number, since it is smaller than the sum of its proper divisors (43264579880).

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

31312120120 is a wasteful number, since it uses less digits than its factorization.

31312120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627832 (or 627828 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31312120120 its reverse (2102121313), we get a palindrome (33414241433).

The spelling of 31312120120 in words is "thirty-one billion, three hundred twelve million, one hundred twenty thousand, one hundred twenty".