111111111000999 has 96 divisors (see below), whose sum is σ = 170555332147200. Its totient is φ = 69580649859840.

The previous prime is 111111111000991. The next prime is 111111111001021. The reversal of 111111111000999 is 999000111111111.

It is not a de Polignac number, because 111111111000999 - 2³ = 111111111000991 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111111000991) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8564790477 + ... + 8564803449.

It is an arithmetic number, because the mean of its divisors is an integer number (1776618043200).

Almost surely, 2^{111111111000999} is an apocalyptic number.

111111111000999 is a deficient number, since it is larger than the sum of its proper divisors (59444221146201).

111111111000999 is a wasteful number, since it uses less digits than its factorization.

111111111000999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14965 (or 14962 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 36.

The spelling of 111111111000999 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, nine hundred ninety-nine", and thus it is an aban number.