11931213139 has 32 divisors (see below), whose sum is σ = 13152680640. Its totient is φ = 10778406912.

The previous prime is 11931213061. The next prime is 11931213169. The reversal of 11931213139 is 93131213911.

It is not a de Polignac number, because 11931213139 - 2⁷ = 11931213011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11931213169) 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, 10915477 + ... + 10916569.

It is an arithmetic number, because the mean of its divisors is an integer number (411021270).

Almost surely, 2^11931213139 is an apocalyptic number.

11931213139 is a deficient number, since it is larger than the sum of its proper divisors (1221467501).

11931213139 is a wasteful number, since it uses less digits than its factorization.

11931213139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399.

The product of its digits is 4374, while the sum is 34.

The spelling of 11931213139 in words is "eleven billion, nine hundred thirty-one million, two hundred thirteen thousand, one hundred thirty-nine".