111110111111100 has 144 divisors (see below), whose sum is σ = 323188094075616. Its totient is φ = 29471877120000.

The previous prime is 111110111111023. The next prime is 111110111111141. The reversal of 111110111111100 is 1111111011111.

It is a super-2 number, since 2×111110111111100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248055340 + ... + 248502860.

It is an arithmetic number, because the mean of its divisors is an integer number (2244361764414).

Almost surely, 2^{111110111111100} is an apocalyptic number.

111110111111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111110111111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161594047037808).

111110111111100 is an abundant number, since it is smaller than the sum of its proper divisors (212077982964516).

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

111110111111100 is a wasteful number, since it uses less digits than its factorization.

111110111111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451936 (or 451929 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 12.

Adding to 111110111111100 its reverse (1111111011111), we get a palindrome (112221222122211).

The spelling of 111110111111100 in words is "one hundred eleven trillion, one hundred ten billion, one hundred eleven million, one hundred eleven thousand, one hundred".