12256331999 has 2 divisors, whose sum is σ = 12256332000. Its totient is φ = 12256331998.

The previous prime is 12256331993. The next prime is 12256332037. The reversal of 12256331999 is 99913365221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12256331999 - 2⁸ = 12256331743 is a prime.

It is a super-2 number, since 2×12256331999² (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 (12256331993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128165999 + 6128166000.

It is an arithmetic number, because the mean of its divisors is an integer number (6128166000).

Almost surely, 2^12256331999 is an apocalyptic number.

12256331999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12256331999 is an equidigital number, since it uses as much as digits as its factorization.

12256331999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 50.

The spelling of 12256331999 in words is "twelve billion, two hundred fifty-six million, three hundred thirty-one thousand, nine hundred ninety-nine".