13211999831 has 2 divisors, whose sum is σ = 13211999832. Its totient is φ = 13211999830.

The previous prime is 13211999819. The next prime is 13211999851. The reversal of 13211999831 is 13899911231.

It is a weak prime.

It is an emirp because it is prime and its reverse (13899911231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13211999831 - 2³⁰ = 12138258007 is a prime.

It is a super-2 number, since 2×13211999831² (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 (13211999851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605999915 + 6605999916.

It is an arithmetic number, because the mean of its divisors is an integer number (6605999916).

Almost surely, 2^13211999831 is an apocalyptic number.

13211999831 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211999831 is an equidigital number, since it uses as much as digits as its factorization.

13211999831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 47.

The spelling of 13211999831 in words is "thirteen billion, two hundred eleven million, nine hundred ninety-nine thousand, eight hundred thirty-one".