11122021120 has 144 divisors (see below), whose sum is σ = 30605940288. Its totient is φ = 3793305600.

The previous prime is 11122021117. The next prime is 11122021181. The reversal of 11122021120 is 2112022111.

It is a self number, because there is not a number n which added to its sum of digits gives 11122021120.

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, 1761970 + ... + 1768270.

It is an arithmetic number, because the mean of its divisors is an integer number (212541252).

Almost surely, 2^11122021120 is an apocalyptic number.

11122021120 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 11122021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15302970144).

11122021120 is an abundant number, since it is smaller than the sum of its proper divisors (19483919168).

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

11122021120 is an equidigital number, since it uses as much as digits as its factorization.

11122021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6526 (or 6512 counting only the distinct ones).

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

Adding to 11122021120 its reverse (2112022111), we get a palindrome (13234043231).

Subtracting from 11122021120 its reverse (2112022111), we obtain a palindrome (9009999009).

The spelling of 11122021120 in words is "eleven billion, one hundred twenty-two million, twenty-one thousand, one hundred twenty".