31020000013191 has 24 divisors (see below), whose sum is σ = 48400752839040. Its totient is φ = 17619572277552.

The previous prime is 31020000013139. The next prime is 31020000013231. The reversal of 31020000013191 is 19131000002013.

It is not a de Polignac number, because 31020000013191 - 2⁶ = 31020000013127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020000013391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 631773081 + ... + 631822178.

It is an arithmetic number, because the mean of its divisors is an integer number (2016698034960).

Almost surely, 2^{31020000013191} is an apocalyptic number.

31020000013191 is a deficient number, since it is larger than the sum of its proper divisors (17380752825849).

31020000013191 is a wasteful number, since it uses less digits than its factorization.

31020000013191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263595443 (or 1263595436 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The spelling of 31020000013191 in words is "thirty-one trillion, twenty billion, thirteen thousand, one hundred ninety-one".