1311310329991 has 2 divisors, whose sum is σ = 1311310329992. Its totient is φ = 1311310329990.

The previous prime is 1311310329929. The next prime is 1311310330049. The reversal of 1311310329991 is 1999230131131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311310329991 - 2⁷ = 1311310329863 is a prime.

It is a super-2 number, since 2×1311310329991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311310324991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655655164995 + 655655164996.

It is an arithmetic number, because the mean of its divisors is an integer number (655655164996).

Almost surely, 2^{1311310329991} is an apocalyptic number.

1311310329991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311310329991 is an equidigital number, since it uses as much as digits as its factorization.

1311310329991 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 1311310329991 in words is "one trillion, three hundred eleven billion, three hundred ten million, three hundred twenty-nine thousand, nine hundred ninety-one".