31313332120 has 32 divisors (see below), whose sum is σ = 80519997600. Its totient is φ = 10735999488.

The previous prime is 31313332103. The next prime is 31313332133. The reversal of 31313332120 is 2123331313.

It is a junction number, because it is equal to n+sod(n) for n = 31313332091 and 31313332100.

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, 55916385 + ... + 55916944.

It is an arithmetic number, because the mean of its divisors is an integer number (2516249925).

Almost surely, 2^31313332120 is an apocalyptic number.

It is an amenable number.

31313332120 is an abundant number, since it is smaller than the sum of its proper divisors (49206665480).

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

31313332120 is a wasteful number, since it uses less digits than its factorization.

31313332120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111833347 (or 111833343 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31313332120 its reverse (2123331313), we get a palindrome (33436663433).

The spelling of 31313332120 in words is "thirty-one billion, three hundred thirteen million, three hundred thirty-two thousand, one hundred twenty".