11221012120 has 32 divisors (see below), whose sum is σ = 25360513920. Its totient is φ = 4468273920.

The previous prime is 11221012097. The next prime is 11221012169. The reversal of 11221012120 is 2121012211.

It is a super-2 number, since 2×11221012120² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11221012120.

It is a congruent number.

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, 620061 + ... + 637900.

It is an arithmetic number, because the mean of its divisors is an integer number (792516060).

Almost surely, 2^11221012120 is an apocalyptic number.

11221012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221012120 is an abundant number, since it is smaller than the sum of its proper divisors (14139501800).

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

11221012120 is a wasteful number, since it uses less digits than its factorization.

11221012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258195 (or 1258191 counting only the distinct ones).

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

Adding to 11221012120 its reverse (2121012211), we get a palindrome (13342024331).

Subtracting from 11221012120 its reverse (2121012211), we obtain a palindrome (9099999909).

The spelling of 11221012120 in words is "eleven billion, two hundred twenty-one million, twelve thousand, one hundred twenty".