1112211220 has 48 divisors (see below), whose sum is σ = 2355091200. Its totient is φ = 441199616.

The previous prime is 1112211209. The next prime is 1112211239. The reversal of 1112211220 is 221122111.

It is a self number, because there is not a number n which added to its sum of digits gives 1112211220.

It is a congruent number.

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, 1856481 + ... + 1857079.

It is an arithmetic number, because the mean of its divisors is an integer number (49064400).

Almost surely, 2^1112211220 is an apocalyptic number.

1112211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1112211220 is an abundant number, since it is smaller than the sum of its proper divisors (1242879980).

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

1112211220 is a wasteful number, since it uses less digits than its factorization.

1112211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1112211220 is about 33349.8308841289. The cubic root of 1112211220 is about 1036.0858853084.

Adding to 1112211220 its reverse (221122111), we get a palindrome (1333333331).

The spelling of 1112211220 in words is "one billion, one hundred twelve million, two hundred eleven thousand, two hundred twenty".