11111011100999 has 4 divisors (see below), whose sum is σ = 11159530800360. Its totient is φ = 11062491401640.

The previous prime is 11111011100977. The next prime is 11111011101007. The reversal of 11111011100999 is 99900111011111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111011100999 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 (11111011900999) 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, 24259849337 + ... + 24259849794.

It is an arithmetic number, because the mean of its divisors is an integer number (2789882700090).

Almost surely, 2^{11111011100999} is an apocalyptic number.

11111011100999 is a deficient number, since it is larger than the sum of its proper divisors (48519699361).

11111011100999 is an equidigital number, since it uses as much as digits as its factorization.

11111011100999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48519699360.

The product of its (nonzero) digits is 729, while the sum is 35.

The spelling of 11111011100999 in words is "eleven trillion, one hundred eleven billion, eleven million, one hundred thousand, nine hundred ninety-nine".