31312220000013 has 12 divisors (see below), whose sum is σ = 46280593902400. Its totient is φ = 20389352557896.

The previous prime is 31312220000011. The next prime is 31312220000051. The reversal of 31312220000013 is 31000002221313.

It is not a de Polignac number, because 31312220000013 - 2¹ = 31312220000011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312220000011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40455064213 + ... + 40455064986.

Almost surely, 2^{31312220000013} is an apocalyptic number.

It is an amenable number.

31312220000013 is a deficient number, since it is larger than the sum of its proper divisors (14968373902387).

31312220000013 is a wasteful number, since it uses less digits than its factorization.

31312220000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80910129248 (or 80910129245 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31312220000013 its reverse (31000002221313), we get a palindrome (62312222221326).

The spelling of 31312220000013 in words is "thirty-one trillion, three hundred twelve billion, two hundred twenty million, thirteen", and thus it is an aban number.