111220002120 has 64 divisors (see below), whose sum is σ = 337099835520. Its totient is φ = 29352904704.

The previous prime is 111220002097. The next prime is 111220002161. The reversal of 111220002120 is 21200022111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111220002096 and 111220002105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4765852 + ... + 4789131.

It is an arithmetic number, because the mean of its divisors is an integer number (5267184930).

Almost surely, 2^111220002120 is an apocalyptic number.

111220002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220002120 is an abundant number, since it is smaller than the sum of its proper divisors (225879833400).

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

111220002120 is a wasteful number, since it uses less digits than its factorization.

111220002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9555094 (or 9555090 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 111220002120 its reverse (21200022111), we get a palindrome (132420024231).

The spelling of 111220002120 in words is "one hundred eleven billion, two hundred twenty million, two thousand, one hundred twenty".