31120211313 has 16 divisors (see below), whose sum is σ = 46266939840. Its totient is φ = 20673492192.

The previous prime is 31120211303. The next prime is 31120211329. The reversal of 31120211313 is 31311202113.

31120211313 is a `hidden beast` number, since 311 + 20 + 21 + 1 + 313 = 666.

It is not a de Polignac number, because 31120211313 - 2²⁴ = 31103434097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31120211303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2028756 + ... + 2044037.

It is an arithmetic number, because the mean of its divisors is an integer number (2891683740).

Almost surely, 2^31120211313 is an apocalyptic number.

It is an amenable number.

31120211313 is a deficient number, since it is larger than the sum of its proper divisors (15146728527).

31120211313 is a wasteful number, since it uses less digits than its factorization.

31120211313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073085 (or 4073079 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31120211313 its reverse (31311202113), we get a palindrome (62431413426).

The spelling of 31120211313 in words is "thirty-one billion, one hundred twenty million, two hundred eleven thousand, three hundred thirteen".