111112121232 has 120 divisors (see below), whose sum is σ = 357168905600. Its totient is φ = 31586734080.

The previous prime is 111112121209. The next prime is 111112121233. The reversal of 111112121232 is 232121211111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (111112121233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76369 + ... + 477552.

Almost surely, 2^111112121232 is an apocalyptic number.

111112121232 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 111112121232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178584452800).

111112121232 is an abundant number, since it is smaller than the sum of its proper divisors (246056784368).

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

111112121232 is a wasteful number, since it uses less digits than its factorization.

111112121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554141 (or 554132 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 111112121232 its reverse (232121211111), we get a palindrome (343233332343).

The spelling of 111112121232 in words is "one hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand, two hundred thirty-two".