22221102220221 has 32 divisors (see below), whose sum is σ = 31687348912128. Its totient is φ = 13802139498240.

The previous prime is 22221102220157. The next prime is 22221102220237. The reversal of 22221102220221 is 12202220112222.

It is not a de Polignac number, because 22221102220221 - 2⁶ = 22221102220157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221102220241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13327656 + ... + 14901966.

It is an arithmetic number, because the mean of its divisors is an integer number (990229653504).

Almost surely, 2^{22221102220221} is an apocalyptic number.

It is an amenable number.

22221102220221 is a deficient number, since it is larger than the sum of its proper divisors (9466246691907).

22221102220221 is a wasteful number, since it uses less digits than its factorization.

22221102220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577121.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22221102220221 its reverse (12202220112222), we get a palindrome (34423322332443).

The spelling of 22221102220221 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred two million, two hundred twenty thousand, two hundred twenty-one".