111111021111112 has 128 divisors (see below), whose sum is σ = 234365400000000. Its totient is φ = 48959921664000.

The previous prime is 111111021111037. The next prime is 111111021111121. The reversal of 111111021111112 is 211111120111111.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88263889 + ... + 89513887.

It is an arithmetic number, because the mean of its divisors is an integer number (1830979687500).

Almost surely, 2^{111111021111112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111111021111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117182700000000).

111111021111112 is an abundant number, since it is smaller than the sum of its proper divisors (123254378888888).

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

111111021111112 is a wasteful number, since it uses less digits than its factorization.

111111021111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250327 (or 1250323 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 16.

Adding to 111111021111112 its reverse (211111120111111), we get a palindrome (322222141222223).

It can be divided in two parts, 1111110 and 21111112, that added together give a palindrome (22222222).

The spelling of 111111021111112 in words is "one hundred eleven trillion, one hundred eleven billion, twenty-one million, one hundred eleven thousand, one hundred twelve".