22102201221 has 16 divisors (see below), whose sum is σ = 29998940160. Its totient is φ = 14472085680.

The previous prime is 22102201217. The next prime is 22102201237. The reversal of 22102201221 is 12210220122.

It is not a de Polignac number, because 22102201221 - 2² = 22102201217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22102201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102201241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198865 + ... + 289398.

It is an arithmetic number, because the mean of its divisors is an integer number (1874933760).

Almost surely, 2^22102201221 is an apocalyptic number.

It is an amenable number.

22102201221 is a deficient number, since it is larger than the sum of its proper divisors (7896738939).

22102201221 is a wasteful number, since it uses less digits than its factorization.

22102201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488536.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22102201221 its reverse (12210220122), we get a palindrome (34312421343).

The spelling of 22102201221 in words is "twenty-two billion, one hundred two million, two hundred one thousand, two hundred twenty-one".