111111100111000 has 64 divisors (see below), whose sum is σ = 283636335584160. Its totient is φ = 40404036400000.

The previous prime is 111111100110973. The next prime is 111111100111051. The reversal of 111111100111000 is 111001111111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5050493551 + ... + 5050515550.

Almost surely, 2^{111111100111000} is an apocalyptic number.

111111100111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111100111000 is an abundant number, since it is smaller than the sum of its proper divisors (172525235473160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111111100111000 is a wasteful number, since it uses less digits than its factorization.

111111100111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10101009133 (or 10101009119 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 111111100111000 its reverse (111001111111), we get a palindrome (111222101222111).

The spelling of 111111100111000 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred million, one hundred eleven thousand".