111220221010120 has 256 divisors, whose sum is σ = 262035212544000. Its totient is φ = 42445867376640.

The previous prime is 111220221010109. The next prime is 111220221010211. The reversal of 111220221010120 is 21010122022111.

It is a junction number, because it is equal to n+sod(n) for n = 111220221010094 and 111220221010103.

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 63 ways as a sum of consecutive naturals, for example, 43632882606 + ... + 43632885154.

It is an arithmetic number, because the mean of its divisors is an integer number (1023575049000).

Almost surely, 2^{111220221010120} is an apocalyptic number.

111220221010120 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 111220221010120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131017606272000).

111220221010120 is an abundant number, since it is smaller than the sum of its proper divisors (150814991533880).

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

111220221010120 is a wasteful number, since it uses less digits than its factorization.

111220221010120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088 (or 4084 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111220221010120 its reverse (21010122022111), we get a palindrome (132230343032231).

The spelling of 111220221010120 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred twenty-one million, ten thousand, one hundred twenty".