11221100221 has 8 divisors (see below), whose sum is σ = 11269044864. Its totient is φ = 11173212960.

The previous prime is 11221100213. The next prime is 11221100227. The reversal of 11221100221 is 12200112211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11221100221 - 2³ = 11221100213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221100227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403260 + ... + 430186.

It is an arithmetic number, because the mean of its divisors is an integer number (1408630608).

Almost surely, 2^11221100221 is an apocalyptic number.

It is an amenable number.

11221100221 is a deficient number, since it is larger than the sum of its proper divisors (47944643).

11221100221 is a wasteful number, since it uses less digits than its factorization.

11221100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28691.

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

Adding to 11221100221 its reverse (12200112211), we get a palindrome (23421212432).

The spelling of 11221100221 in words is "eleven billion, two hundred twenty-one million, one hundred thousand, two hundred twenty-one".