11939885131 has 2 divisors, whose sum is σ = 11939885132. Its totient is φ = 11939885130.

The previous prime is 11939885119. The next prime is 11939885159. The reversal of 11939885131 is 13158893911.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11939885131 is a prime.

It is a super-2 number, since 2×11939885131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11939885231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5969942565 + 5969942566.

It is an arithmetic number, because the mean of its divisors is an integer number (5969942566).

Almost surely, 2^11939885131 is an apocalyptic number.

11939885131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11939885131 is an equidigital number, since it uses as much as digits as its factorization.

11939885131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 49.

The spelling of 11939885131 in words is "eleven billion, nine hundred thirty-nine million, eight hundred eighty-five thousand, one hundred thirty-one".