31113113213 has 32 divisors (see below), whose sum is σ = 38757519360. Its totient is φ = 24319673280.

The previous prime is 31113113197. The next prime is 31113113249. The reversal of 31113113213 is 31231131113.

It is not a de Polignac number, because 31113113213 - 2⁴ = 31113113197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113113413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3686108 + ... + 3694538.

It is an arithmetic number, because the mean of its divisors is an integer number (1211172480).

Almost surely, 2^31113113213 is an apocalyptic number.

It is an amenable number.

31113113213 is a deficient number, since it is larger than the sum of its proper divisors (7644406147).

31113113213 is a wasteful number, since it uses less digits than its factorization.

31113113213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8937.

The product of its digits is 162, while the sum is 20.

Adding to 31113113213 its reverse (31231131113), we get a palindrome (62344244326).

The spelling of 31113113213 in words is "thirty-one billion, one hundred thirteen million, one hundred thirteen thousand, two hundred thirteen".