111121220320 has 96 divisors (see below), whose sum is σ = 301462922880. Its totient is φ = 38280983040.

The previous prime is 111121220311. The next prime is 111121220323. The reversal of 111121220320 is 23022121111.

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 = 111121220294 and 111121220303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121220323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1628062 + ... + 1694941.

It is an arithmetic number, because the mean of its divisors is an integer number (3140238780).

Almost surely, 2^111121220320 is an apocalyptic number.

111121220320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121220320 is an abundant number, since it is smaller than the sum of its proper divisors (190341702560).

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

111121220320 is a wasteful number, since it uses less digits than its factorization.

111121220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323048 (or 3323040 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111121220320 its reverse (23022121111), we get a palindrome (134143341431).

The spelling of 111121220320 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twenty thousand, three hundred twenty".