11221102221 has 32 divisors (see below), whose sum is σ = 17636606208. Its totient is φ = 6211883520.

The previous prime is 11221102171. The next prime is 11221102223. The reversal of 11221102221 is 12220112211.

It is not a de Polignac number, because 11221102221 - 2⁹ = 11221101709 is a prime.

It is a super-2 number, since 2×11221102221² (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 11221102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221102223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150051 + ... + 212031.

It is an arithmetic number, because the mean of its divisors is an integer number (551143944).

Almost surely, 2^11221102221 is an apocalyptic number.

It is an amenable number.

11221102221 is a deficient number, since it is larger than the sum of its proper divisors (6415503987).

11221102221 is a wasteful number, since it uses less digits than its factorization.

11221102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62261.

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

Adding to 11221102221 its reverse (12220112211), we get a palindrome (23441214432).

The spelling of 11221102221 in words is "eleven billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".