111110111112 has 512 divisors, whose sum is σ = 391007232000. Its totient is φ = 25909632000.

The previous prime is 111110111093. The next prime is 111110111239. The reversal of 111110111112 is 211111011111.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 43554237 + ... + 43556787.

It is an arithmetic number, because the mean of its divisors is an integer number (763686000).

Almost surely, 2^111110111112 is an apocalyptic number.

111110111112 is a gapful number since it is divisible by the number (12) 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 111110111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195503616000).

111110111112 is an abundant number, since it is smaller than the sum of its proper divisors (279897120888).

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

111110111112 is a wasteful number, since it uses less digits than its factorization.

111110111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 111110111112 its reverse (211111011111), we get a palindrome (322221122223).

It can be divided in two parts, 11111011111 and 2, that multiplied together give a palindrome (22222022222).

The spelling of 111110111112 in words is "one hundred eleven billion, one hundred ten million, one hundred eleven thousand, one hundred twelve".