12131311999 has 2 divisors, whose sum is σ = 12131312000. Its totient is φ = 12131311998.

The previous prime is 12131311967. The next prime is 12131312077. The reversal of 12131311999 is 99911313121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12131311999 - 2⁵ = 12131311967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12131311909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6065655999 + 6065656000.

It is an arithmetic number, because the mean of its divisors is an integer number (6065656000).

Almost surely, 2^12131311999 is an apocalyptic number.

12131311999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131311999 is an equidigital number, since it uses as much as digits as its factorization.

12131311999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 40.

The spelling of 12131311999 in words is "twelve billion, one hundred thirty-one million, three hundred eleven thousand, nine hundred ninety-nine".