11221041220 has 24 divisors (see below), whose sum is σ = 23667096600. Its totient is φ = 4468814592.

The previous prime is 11221041187. The next prime is 11221041241. The reversal of 11221041220 is 2214012211.

It can be written as a sum of positive squares in 4 ways, for example, as 7495403776 + 3725637444 = 86576^2 + 61038^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11221041194 and 11221041203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1220425 + ... + 1229584.

It is an arithmetic number, because the mean of its divisors is an integer number (986129025).

Almost surely, 2^11221041220 is an apocalyptic number.

11221041220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221041220 is an abundant number, since it is smaller than the sum of its proper divisors (12446055380).

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

11221041220 is a wasteful number, since it uses less digits than its factorization.

11221041220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450247 (or 2450245 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11221041220 its reverse (2214012211), we get a palindrome (13435053431).

The spelling of 11221041220 in words is "eleven billion, two hundred twenty-one million, forty-one thousand, two hundred twenty".