111216320 has 56 divisors (see below), whose sum is σ = 267638784. Its totient is φ = 44015616.

The previous prime is 111216319. The next prime is 111216323. The reversal of 111216320 is 23612111.

It is not an unprimeable number, because it can be changed into a prime (111216323) 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, 29249 + ... + 32831.

It is an arithmetic number, because the mean of its divisors is an integer number (4779264).

Almost surely, 2^111216320 is an apocalyptic number.

111216320 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 111216320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133819392).

111216320 is an abundant number, since it is smaller than the sum of its proper divisors (156422464).

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

111216320 is an equidigital number, since it uses as much as digits as its factorization.

111216320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697 (or 3687 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 111216320 is about 10545.9148488882. The cubic root of 111216320 is about 480.9015463767.

Adding to 111216320 its reverse (23612111), we get a palindrome (134828431).

The spelling of 111216320 in words is "one hundred eleven million, two hundred sixteen thousand, three hundred twenty".