11221111112120 has 128 divisors (see below), whose sum is σ = 31279634749440. Its totient is φ = 3527778009600.

The previous prime is 11221111112051. The next prime is 11221111112179. The reversal of 11221111112120 is 2121111112211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9658052 + ... + 10757331.

It is an arithmetic number, because the mean of its divisors is an integer number (244372146480).

Almost surely, 2^{11221111112120} is an apocalyptic number.

11221111112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221111112120 is an abundant number, since it is smaller than the sum of its proper divisors (20058523637320).

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

11221111112120 is a wasteful number, since it uses less digits than its factorization.

11221111112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20415565 (or 20415561 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11221111112120 its reverse (2121111112211), we get a palindrome (13342222224331).

Subtracting from 11221111112120 its reverse (2121111112211), we obtain a palindrome (9099999999909).

The spelling of 11221111112120 in words is "eleven trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twelve thousand, one hundred twenty".