111121200112 has 20 divisors (see below), whose sum is σ = 231858658360. Its totient is φ = 51286707648.

The previous prime is 111121200107. The next prime is 111121200131. The reversal of 111121200112 is 211002121111.

It is a happy number.

It is a super-2 number, since 2×111121200112² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 111121200092 and 111121200101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267118062 + ... + 267118477.

It is an arithmetic number, because the mean of its divisors is an integer number (11592932918).

Almost surely, 2^111121200112 is an apocalyptic number.

It is an amenable number.

111121200112 is an abundant number, since it is smaller than the sum of its proper divisors (120737458248).

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

111121200112 is a wasteful number, since it uses less digits than its factorization.

111121200112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534236560 (or 534236554 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111121200112 its reverse (211002121111), we get a palindrome (322123321223).

The spelling of 111121200112 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred thousand, one hundred twelve".