22221202100021 has 8 divisors (see below), whose sum is σ = 22766964689664. Its totient is φ = 21678479971120.

The previous prime is 22221202099933. The next prime is 22221202100051. The reversal of 22221202100021 is 12000120212222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221202100021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221202100051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760100390 + ... + 760129623.

It is an arithmetic number, because the mean of its divisors is an integer number (2845870586208).

Almost surely, 2^{22221202100021} is an apocalyptic number.

It is an amenable number.

22221202100021 is a deficient number, since it is larger than the sum of its proper divisors (545762589643).

22221202100021 is a wasteful number, since it uses less digits than its factorization.

22221202100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520230371.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22221202100021 its reverse (12000120212222), we get a palindrome (34221322312243).

The spelling of 22221202100021 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred two million, one hundred thousand, twenty-one".