12131005239 has 6 divisors (see below), whose sum is σ = 17522563136. Its totient is φ = 8087336820.

The previous prime is 12131005213. The next prime is 12131005309. The reversal of 12131005239 is 93250013121.

12131005239 is a `hidden beast` number, since 1 + 2 + 131 + 0 + 0 + 523 + 9 = 666.

12131005239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12131005239 - 2¹⁷ = 12130874167 is a prime.

It is a super-2 number, since 2×12131005239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131005039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673944727 + ... + 673944744.

Almost surely, 2^12131005239 is an apocalyptic number.

12131005239 is a deficient number, since it is larger than the sum of its proper divisors (5391557897).

12131005239 is a wasteful number, since it uses less digits than its factorization.

12131005239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347889477 (or 1347889474 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The spelling of 12131005239 in words is "twelve billion, one hundred thirty-one million, five thousand, two hundred thirty-nine".