111121010112 has 56 divisors (see below), whose sum is σ = 336008772736. Its totient is φ = 31748859648.

The previous prime is 111121010111. The next prime is 111121010131. The reversal of 111121010112 is 211010121111.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×111121010112² (a number of 23 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 not an unprimeable number, because it can be changed into a prime (111121010111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41338318 + ... + 41341005.

It is an arithmetic number, because the mean of its divisors is an integer number (6000156656).

Almost surely, 2^111121010112 is an apocalyptic number.

111121010112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111121010112 is an abundant number, since it is smaller than the sum of its proper divisors (224887762624).

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

111121010112 is an equidigital number, since it uses as much as digits as its factorization.

111121010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82679345 (or 82679335 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111121010112 its reverse (211010121111), we get a palindrome (322131131223).

The spelling of 111121010112 in words is "one hundred eleven billion, one hundred twenty-one million, ten thousand, one hundred twelve".