111113203120 has 80 divisors (see below), whose sum is σ = 263333958048. Its totient is φ = 43590021120.

The previous prime is 111113203109. The next prime is 111113203133. The reversal of 111113203120 is 21302311111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×111113203120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 111113203094 and 111113203103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1660552 + ... + 1726168.

Almost surely, 2^111113203120 is an apocalyptic number.

111113203120 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 111113203120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131666979024).

111113203120 is an abundant number, since it is smaller than the sum of its proper divisors (152220754928).

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

111113203120 is a wasteful number, since it uses less digits than its factorization.

111113203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66038 (or 66032 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111113203120 its reverse (21302311111), we get a palindrome (132415514231).

The spelling of 111113203120 in words is "one hundred eleven billion, one hundred thirteen million, two hundred three thousand, one hundred twenty".