111011221100999 has 12 divisors (see below), whose sum is σ = 117422366018400. Its totient is φ = 104934296759040.

The previous prime is 111011221100957. The next prime is 111011221101059. The reversal of 111011221100999 is 999001122110111.

It is not a de Polignac number, because 111011221100999 - 2⁸ = 111011221100743 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 (111011221100909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342277007 + ... + 342601184.

It is an arithmetic number, because the mean of its divisors is an integer number (9785197168200).

Almost surely, 2^{111011221100999} is an apocalyptic number.

111011221100999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

111011221100999 is a deficient number, since it is larger than the sum of its proper divisors (6411144917401).

111011221100999 is an equidigital number, since it uses as much as digits as its factorization.

111011221100999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684878678 (or 684878659 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 38.

The spelling of 111011221100999 in words is "one hundred eleven trillion, eleven billion, two hundred twenty-one million, one hundred thousand, nine hundred ninety-nine".