111231120 has 320 divisors, whose sum is σ = 463970304. Its totient is φ = 21288960.

The previous prime is 111231103. The next prime is 111231143. The reversal of 111231120 is 21132111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111231096 and 111231105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 240009 + ... + 240471.

Almost surely, 2^111231120 is an apocalyptic number.

111231120 is a gapful number since it is divisible by the number (10) 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 111231120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231985152).

111231120 is an abundant number, since it is smaller than the sum of its proper divisors (352739184).

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

111231120 is a wasteful number, since it uses less digits than its factorization.

111231120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 504 counting only the distinct ones).

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

The square root of 111231120 is about 10546.6165190548. The cubic root of 111231120 is about 480.9228772605.

Adding to 111231120 its reverse (21132111), we get a palindrome (132363231).

Subtracting from 111231120 its reverse (21132111), we obtain a palindrome (90099009).

The spelling of 111231120 in words is "one hundred eleven million, two hundred thirty-one thousand, one hundred twenty".