111331320 has 64 divisors (see below), whose sum is σ = 335106720. Its totient is φ = 29589504.

The previous prime is 111331309. The next prime is 111331321. The reversal of 111331320 is 23133111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111331320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111331321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39064 + ... + 41816.

Almost surely, 2^111331320 is an apocalyptic number.

111331320 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 111331320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167553360).

111331320 is an abundant number, since it is smaller than the sum of its proper divisors (223775400).

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

111331320 is a wasteful number, since it uses less digits than its factorization.

111331320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104 (or 3100 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 111331320 is about 10551.3657883707. The cubic root of 111331320 is about 481.0672433627.

Adding to 111331320 its reverse (23133111), we get a palindrome (134464431).

It can be divided in two parts, 11 and 1331320, that added together give a palindrome (1331331).

The spelling of 111331320 in words is "one hundred eleven million, three hundred thirty-one thousand, three hundred twenty".