111220112021220 has 288 divisors, whose sum is σ = 377982200494080. Its totient is φ = 26306448261120.

The previous prime is 111220112021219. The next prime is 111220112021267. The reversal of 111220112021220 is 22120211022111.

111220112021220 is a `hidden beast` number, since 1 + 11 + 220 + 11 + 202 + 1 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111220112021193 and 111220112021202.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6096964 + ... + 16112516.

It is an arithmetic number, because the mean of its divisors is an integer number (1312438196160).

Almost surely, 2^{111220112021220} is an apocalyptic number.

111220112021220 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 111220112021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188991100247040).

111220112021220 is an abundant number, since it is smaller than the sum of its proper divisors (266762088472860).

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

111220112021220 is a wasteful number, since it uses less digits than its factorization.

111220112021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10015795 (or 10015790 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111220112021220 its reverse (22120211022111), we get a palindrome (133340323043331).

The spelling of 111220112021220 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twelve million, twenty-one thousand, two hundred twenty".