1113313111991 has 2 divisors, whose sum is σ = 1113313111992. Its totient is φ = 1113313111990.

The previous prime is 1113313111901. The next prime is 1113313112029. The reversal of 1113313111991 is 1991113133111.

It is a strong prime.

It is an emirp because it is prime and its reverse (1991113133111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1113313111991 - 2¹⁴ = 1113313095607 is a prime.

It is a super-3 number, since 3×1113313111991³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113313111901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556656555995 + 556656555996.

It is an arithmetic number, because the mean of its divisors is an integer number (556656555996).

Almost surely, 2^{1113313111991} is an apocalyptic number.

1113313111991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113313111991 is an equidigital number, since it uses as much as digits as its factorization.

1113313111991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2187, while the sum is 35.

The spelling of 1113313111991 in words is "one trillion, one hundred thirteen billion, three hundred thirteen million, one hundred eleven thousand, nine hundred ninety-one".