13031131021999 has 2 divisors, whose sum is σ = 13031131022000. Its totient is φ = 13031131021998.

The previous prime is 13031131021939. The next prime is 13031131022051. The reversal of 13031131021999 is 99912013113031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13031131021999 - 2²⁷ = 13030996804271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13031131021939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515565510999 + 6515565511000.

It is an arithmetic number, because the mean of its divisors is an integer number (6515565511000).

Almost surely, 2^{13031131021999} is an apocalyptic number.

13031131021999 is a deficient number, since it is larger than the sum of its proper divisors (1).

13031131021999 is an equidigital number, since it uses as much as digits as its factorization.

13031131021999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 43.

The spelling of 13031131021999 in words is "thirteen trillion, thirty-one billion, one hundred thirty-one million, twenty-one thousand, nine hundred ninety-nine".