22211102221 has 32 divisors (see below), whose sum is σ = 28423987200. Its totient is φ = 16853443200.

The previous prime is 22211102189. The next prime is 22211102237. The reversal of 22211102221 is 12220111222.

It is a happy number.

It is not a de Polignac number, because 22211102221 - 2⁵ = 22211102189 is a prime.

It is a super-2 number, since 2×22211102221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22211102195 and 22211102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211102521) 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, 704761 + ... + 735601.

It is an arithmetic number, because the mean of its divisors is an integer number (888249600).

Almost surely, 2^22211102221 is an apocalyptic number.

It is an amenable number.

22211102221 is a deficient number, since it is larger than the sum of its proper divisors (6212884979).

22211102221 is a wasteful number, since it uses less digits than its factorization.

22211102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31105.

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

Adding to 22211102221 its reverse (12220111222), we get a palindrome (34431213443).

Subtracting from 22211102221 its reverse (12220111222), we obtain a palindrome (9990990999).

The spelling of 22211102221 in words is "twenty-two billion, two hundred eleven million, one hundred two thousand, two hundred twenty-one".