31013312113 has 12 divisors (see below), whose sum is σ = 37240476672. Its totient is φ = 25725326760.

The previous prime is 31013312111. The next prime is 31013312159. The reversal of 31013312113 is 31121331013.

It is not a de Polignac number, because 31013312113 - 2¹ = 31013312111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31013312111) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10206945 + ... + 10209982.

It is an arithmetic number, because the mean of its divisors is an integer number (3103373056).

Almost surely, 2^31013312113 is an apocalyptic number.

It is an amenable number.

31013312113 is a deficient number, since it is larger than the sum of its proper divisors (6227164559).

31013312113 is a wasteful number, since it uses less digits than its factorization.

31013312113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20416972 (or 20416965 counting only the distinct ones).

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

Adding to 31013312113 its reverse (31121331013), we get a palindrome (62134643126).

The spelling of 31013312113 in words is "thirty-one billion, thirteen million, three hundred twelve thousand, one hundred thirteen".