31313113120 has 48 divisors (see below), whose sum is σ = 74020865688. Its totient is φ = 12517857280.

The previous prime is 31313112979. The next prime is 31313113141. The reversal of 31313113120 is 2131131313.

It can be written as a sum of positive squares in 4 ways, for example, as 30439083024 + 874030096 = 174468^2 + 29564^2 .

It is a super-2 number, since 2×31313113120² (a number of 22 digits) contains 22 as substring.

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, 218502 + ... + 332218.

Almost surely, 2^31313113120 is an apocalyptic number.

It is an amenable number.

31313113120 is an abundant number, since it is smaller than the sum of its proper divisors (42707752568).

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

31313113120 is a wasteful number, since it uses less digits than its factorization.

31313113120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115453 (or 115445 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31313113120 its reverse (2131131313), we get a palindrome (33444244433).

The spelling of 31313113120 in words is "thirty-one billion, three hundred thirteen million, one hundred thirteen thousand, one hundred twenty".