1011111100999 has 4 divisors (see below), whose sum is σ = 1043727588160. Its totient is φ = 978494613840.

The previous prime is 1011111100969. The next prime is 1011111101009. The reversal of 1011111100999 is 9990011111101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1011111100999 - 2⁹ = 1011111100487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011111100919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16308243534 + ... + 16308243595.

It is an arithmetic number, because the mean of its divisors is an integer number (260931897040).

Almost surely, 2^{1011111100999} is an apocalyptic number.

1011111100999 is a deficient number, since it is larger than the sum of its proper divisors (32616487161).

1011111100999 is an equidigital number, since it uses as much as digits as its factorization.

1011111100999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32616487160.

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

The spelling of 1011111100999 in words is "one trillion, eleven billion, one hundred eleven million, one hundred thousand, nine hundred ninety-nine".