22210201221 has 24 divisors (see below), whose sum is σ = 33754540320. Its totient is φ = 12948451776.

The previous prime is 22210201217. The next prime is 22210201241. The reversal of 22210201221 is 12210201222.

It is not a de Polignac number, because 22210201221 - 2² = 22210201217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22210201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210201241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1143186 + ... + 1162451.

It is an arithmetic number, because the mean of its divisors is an integer number (1406439180).

Almost surely, 2^22210201221 is an apocalyptic number.

It is an amenable number.

22210201221 is a deficient number, since it is larger than the sum of its proper divisors (11544339099).

22210201221 is a wasteful number, since it uses less digits than its factorization.

22210201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305685 (or 2305672 counting only the distinct ones).

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

Adding to 22210201221 its reverse (12210201222), we get a palindrome (34420402443).

Subtracting from 22210201221 its reverse (12210201222), we obtain a palindrome (9999999999).

The spelling of 22210201221 in words is "twenty-two billion, two hundred ten million, two hundred one thousand, two hundred twenty-one".