111311331320 has 256 divisors, whose sum is σ = 302558699520. Its totient is φ = 36055756800.

The previous prime is 111311331293. The next prime is 111311331349. The reversal of 111311331320 is 23133113111.

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 = 111311331292 and 111311331301.

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, 115109477 + ... + 115110443.

It is an arithmetic number, because the mean of its divisors is an integer number (1181869920).

Almost surely, 2^111311331320 is an apocalyptic number.

111311331320 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 111311331320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151279349760).

111311331320 is an abundant number, since it is smaller than the sum of its proper divisors (191247368200).

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

111311331320 is a wasteful number, since it uses less digits than its factorization.

111311331320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334 (or 1330 counting only the distinct ones).

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

Adding to 111311331320 its reverse (23133113111), we get a palindrome (134444444431).

The spelling of 111311331320 in words is "one hundred eleven billion, three hundred eleven million, three hundred thirty-one thousand, three hundred twenty".