12031131269 has 2 divisors, whose sum is σ = 12031131270. Its totient is φ = 12031131268.

The previous prime is 12031131187. The next prime is 12031131311. The reversal of 12031131269 is 96213113021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11443650625 + 587480644 = 106975^2 + 24238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031131269 is a prime.

It is a super-2 number, since 2×12031131269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12031133269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015565634 + 6015565635.

It is an arithmetic number, because the mean of its divisors is an integer number (6015565635).

Almost surely, 2^12031131269 is an apocalyptic number.

It is an amenable number.

12031131269 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031131269 is an equidigital number, since it uses as much as digits as its factorization.

12031131269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 12031131269 in words is "twelve billion, thirty-one million, one hundred thirty-one thousand, two hundred sixty-nine".