111331231000 has 128 divisors (see below), whose sum is σ = 284655720960. Its totient is φ = 40418928000.

The previous prime is 111331230979. The next prime is 111331231001. The reversal of 111331231000 is 132133111.

It is a super-2 number, since 2×111331231000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111331231001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7109179 + ... + 7124821.

It is an arithmetic number, because the mean of its divisors is an integer number (2223872820).

Almost surely, 2^111331231000 is an apocalyptic number.

111331231000 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 111331231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142327860480).

111331231000 is an abundant number, since it is smaller than the sum of its proper divisors (173324489960).

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

111331231000 is a wasteful number, since it uses less digits than its factorization.

111331231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16322 (or 16308 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 111331231000 its reverse (132133111), we get a palindrome (111463364111).

The spelling of 111331231000 in words is "one hundred eleven billion, three hundred thirty-one million, two hundred thirty-one thousand".