31013112111213 has 4 divisors (see below), whose sum is σ = 41350816148288. Its totient is φ = 20675408074140.

The previous prime is 31013112111169. The next prime is 31013112111221. The reversal of 31013112111213 is 31211121131013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31013112111213 - 2⁸ = 31013112110957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31013112111213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013112111313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5168852018533 + ... + 5168852018538.

It is an arithmetic number, because the mean of its divisors is an integer number (10337704037072).

Almost surely, 2^{31013112111213} is an apocalyptic number.

It is an amenable number.

31013112111213 is a deficient number, since it is larger than the sum of its proper divisors (10337704037075).

31013112111213 is a wasteful number, since it uses less digits than its factorization.

31013112111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337704037074.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 31013112111213 its reverse (31211121131013), we get a palindrome (62224233242226).

The spelling of 31013112111213 in words is "thirty-one trillion, thirteen billion, one hundred twelve million, one hundred eleven thousand, two hundred thirteen".