111355320120 has 128 divisors (see below), whose sum is σ = 365279120640. Its totient is φ = 26932746240.

The previous prime is 111355320059. The next prime is 111355320149. The reversal of 111355320120 is 21023553111.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 474147 + ... + 668973.

It is an arithmetic number, because the mean of its divisors is an integer number (2853743130).

Almost surely, 2^111355320120 is an apocalyptic number.

111355320120 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 111355320120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182639560320).

111355320120 is an abundant number, since it is smaller than the sum of its proper divisors (253923800520).

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

111355320120 is a wasteful number, since it uses less digits than its factorization.

111355320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195285 (or 195281 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 111355320120 its reverse (21023553111), we get a palindrome (132378873231).

The spelling of 111355320120 in words is "one hundred eleven billion, three hundred fifty-five million, three hundred twenty thousand, one hundred twenty".