111121656112 has 40 divisors (see below), whose sum is σ = 222386337792. Its totient is φ = 53733940800.

The previous prime is 111121656109. The next prime is 111121656133. The reversal of 111121656112 is 211656121111.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 707913 + ... + 850519.

Almost surely, 2^111121656112 is an apocalyptic number.

It is an amenable number.

111121656112 is an abundant number, since it is smaller than the sum of its proper divisors (111264681680).

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

111121656112 is a wasteful number, since it uses less digits than its factorization.

111121656112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144217 (or 144211 counting only the distinct ones).

The product of its digits is 720, while the sum is 28.

Adding to 111121656112 its reverse (211656121111), we get a palindrome (322777777223).

The spelling of 111121656112 in words is "one hundred eleven billion, one hundred twenty-one million, six hundred fifty-six thousand, one hundred twelve".