1311331199 has 2 divisors, whose sum is σ = 1311331200. Its totient is φ = 1311331198.

The previous prime is 1311331183. The next prime is 1311331211. The reversal of 1311331199 is 9911331131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311331199 - 2⁴ = 1311331183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311331129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655665599 + 655665600.

It is an arithmetic number, because the mean of its divisors is an integer number (655665600).

Almost surely, 2^1311331199 is an apocalyptic number.

1311331199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311331199 is an equidigital number, since it uses as much as digits as its factorization.

1311331199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187, while the sum is 32.

The square root of 1311331199 is about 36212.3072863357. The cubic root of 1311331199 is about 1094.5546861431.

The spelling of 1311331199 in words is "one billion, three hundred eleven million, three hundred thirty-one thousand, one hundred ninety-nine".