1311322111999 has 2 divisors, whose sum is σ = 1311322112000. Its totient is φ = 1311322111998.

The previous prime is 1311322111993. The next prime is 1311322112003. The reversal of 1311322111999 is 9991112231131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311322111999 - 2⁷ = 1311322111871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311322111993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655661055999 + 655661056000.

It is an arithmetic number, because the mean of its divisors is an integer number (655661056000).

Almost surely, 2^{1311322111999} is an apocalyptic number.

1311322111999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311322111999 is an equidigital number, since it uses as much as digits as its factorization.

1311322111999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 43.

The spelling of 1311322111999 in words is "one trillion, three hundred eleven billion, three hundred twenty-two million, one hundred eleven thousand, nine hundred ninety-nine".