111100111000999 has 2 divisors, whose sum is σ = 111100111001000. Its totient is φ = 111100111000998.

The previous prime is 111100111000961. The next prime is 111100111001003. The reversal of 111100111000999 is 999000111001111.

It is a strong prime.

It is an emirp because it is prime and its reverse (999000111001111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111100111000999 - 2²⁹ = 111099574130087 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111100111000499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550055500499 + 55550055500500.

It is an arithmetic number, because the mean of its divisors is an integer number (55550055500500).

Almost surely, 2^{111100111000999} is an apocalyptic number.

111100111000999 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100111000999 is an equidigital number, since it uses as much as digits as its factorization.

111100111000999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 34.

The spelling of 111100111000999 in words is "one hundred eleven trillion, one hundred billion, one hundred eleven million, nine hundred ninety-nine", and thus it is an aban number.