31313113012 has 24 divisors (see below), whose sum is σ = 55348253856. Its totient is φ = 15499528608.

The previous prime is 31313112979. The next prime is 31313113141. The reversal of 31313113012 is 21031131313.

It is a super-2 number, since 2×31313113012² (a number of 22 digits) contains 22 as substring.

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, 614503 + ... + 663505.

It is an arithmetic number, because the mean of its divisors is an integer number (2306177244).

Almost surely, 2^31313113012 is an apocalyptic number.

It is an amenable number.

31313113012 is a deficient number, since it is larger than the sum of its proper divisors (24035140844).

31313113012 is a wasteful number, since it uses less digits than its factorization.

31313113012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50607 (or 50605 counting only the distinct ones).

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

Adding to 31313113012 its reverse (21031131313), we get a palindrome (52344244325).

The spelling of 31313113012 in words is "thirty-one billion, three hundred thirteen million, one hundred thirteen thousand, twelve".