1112021220 has 48 divisors (see below), whose sum is σ = 3115284480. Its totient is φ = 296384256.

The previous prime is 1112021213. The next prime is 1112021231. The reversal of 1112021220 is 221202111.

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 = 1112021196 and 1112021205.

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, 154461 + ... + 161499.

It is an arithmetic number, because the mean of its divisors is an integer number (64901760).

Almost surely, 2^1112021220 is an apocalyptic number.

1112021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1112021220 is an abundant number, since it is smaller than the sum of its proper divisors (2003263260).

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

1112021220 is a wasteful number, since it uses less digits than its factorization.

1112021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684 (or 9682 counting only the distinct ones).

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

The square root of 1112021220 is about 33346.9821723046. The cubic root of 1112021220 is about 1036.0268834673.

Adding to 1112021220 its reverse (221202111), we get a palindrome (1333223331).

The spelling of 1112021220 in words is "one billion, one hundred twelve million, twenty-one thousand, two hundred twenty".