111120121220 has 96 divisors (see below), whose sum is σ = 238976771040. Its totient is φ = 43392614400.

The previous prime is 111120121207. The next prime is 111120121243. The reversal of 111120121220 is 22121021111.

It can be written as a sum of positive squares in 16 ways, for example, as 4180656964 + 106939464256 = 64658^2 + 327016^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111120121195 and 111120121204.

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, 62112086 + ... + 62113874.

It is an arithmetic number, because the mean of its divisors is an integer number (2489341365).

Almost surely, 2^111120121220 is an apocalyptic number.

111120121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111120121220 is an abundant number, since it is smaller than the sum of its proper divisors (127856649820).

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

111120121220 is a wasteful number, since it uses less digits than its factorization.

111120121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313 (or 2311 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111120121220 its reverse (22121021111), we get a palindrome (133241142331).

The spelling of 111120121220 in words is "one hundred eleven billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty".