1311109999 has 2 divisors, whose sum is σ = 1311110000. Its totient is φ = 1311109998.

The previous prime is 1311109993. The next prime is 1311110011. The reversal of 1311109999 is 9999011131.

It is a weak prime.

It is an emirp because it is prime and its reverse (9999011131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311109999 - 2⁹ = 1311109487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311109993) 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, 655554999 + 655555000.

It is an arithmetic number, because the mean of its divisors is an integer number (655555000).

Almost surely, 2^1311109999 is an apocalyptic number.

1311109999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311109999 is an equidigital number, since it uses as much as digits as its factorization.

1311109999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19683, while the sum is 43.

The square root of 1311109999 is about 36209.2529472785. The cubic root of 1311109999 is about 1094.4931382261.

The spelling of 1311109999 in words is "one billion, three hundred eleven million, one hundred nine thousand, nine hundred ninety-nine".