11221112220 has 48 divisors (see below), whose sum is σ = 31506693120. Its totient is φ = 2983955776.

The previous prime is 11221112213. The next prime is 11221112239. The reversal of 11221112220 is 2221112211.

11221112220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11221112220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238932 + ... + 282011.

It is an arithmetic number, because the mean of its divisors is an integer number (656389440).

Almost surely, 2^11221112220 is an apocalyptic number.

11221112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221112220 is an abundant number, since it is smaller than the sum of its proper divisors (20285580900).

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

11221112220 is a wasteful number, since it uses less digits than its factorization.

11221112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521314 (or 521312 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11221112220 its reverse (2221112211), we get a palindrome (13442224431).

Subtracting from 11221112220 its reverse (2221112211), we obtain a palindrome (9000000009).

The spelling of 11221112220 in words is "eleven billion, two hundred twenty-one million, one hundred twelve thousand, two hundred twenty".