11222222120 has 32 divisors (see below), whose sum is σ = 25726419720. Its totient is φ = 4404192000.

The previous prime is 11222222113. The next prime is 11222222147. The reversal of 11222222120 is 2122222211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11222012356 + 209764 = 105934^2 + 458^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2644631 + ... + 2648870.

Almost surely, 2^11222222120 is an apocalyptic number.

11222222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11222222120 is an abundant number, since it is smaller than the sum of its proper divisors (14504197600).

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

11222222120 is a wasteful number, since it uses less digits than its factorization.

11222222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5293565 (or 5293561 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 11222222120 its reverse (2122222211), we get a palindrome (13344444331).

Subtracting from 11222222120 its reverse (2122222211), we obtain a palindrome (9099999909).

The spelling of 11222222120 in words is "eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty".