111331311320 has 128 divisors (see below), whose sum is σ = 259471460160. Its totient is φ = 42959185920.

The previous prime is 111331311277. The next prime is 111331311347. The reversal of 111331311320 is 23113133111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111331311292 and 111331311301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122746307 + ... + 122747213.

Almost surely, 2^111331311320 is an apocalyptic number.

111331311320 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 111331311320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129735730080).

111331311320 is an abundant number, since it is smaller than the sum of its proper divisors (148140148840).

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

111331311320 is a wasteful number, since it uses less digits than its factorization.

111331311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 111331311320 its reverse (23113133111), we get a palindrome (134444444431).

The spelling of 111331311320 in words is "one hundred eleven billion, three hundred thirty-one million, three hundred eleven thousand, three hundred twenty".