111331012320 has 144 divisors (see below), whose sum is σ = 414455054832. Its totient is φ = 26989332480.

The previous prime is 111331012307. The next prime is 111331012363. The reversal of 111331012320 is 23210133111.

111331012320 is a `hidden beast` number, since 1 + 1 + 1 + 331 + 0 + 12 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111331012293 and 111331012302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3498397 + ... + 3530076.

It is an arithmetic number, because the mean of its divisors is an integer number (2878160103).

Almost surely, 2^111331012320 is an apocalyptic number.

111331012320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111331012320 is an abundant number, since it is smaller than the sum of its proper divisors (303124042512).

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

111331012320 is a wasteful number, since it uses less digits than its factorization.

111331012320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7028505 (or 7028494 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 111331012320 its reverse (23210133111), we get a palindrome (134541145431).

The spelling of 111331012320 in words is "one hundred eleven billion, three hundred thirty-one million, twelve thousand, three hundred twenty".