22001222210021 has 8 divisors (see below), whose sum is σ = 22013971636800. Its totient is φ = 21988473246432.

The previous prime is 22001222209943. The next prime is 22001222210029. The reversal of 22001222210021 is 12001222210022.

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 not a de Polignac number, because 22001222210021 - 2³⁴ = 21984042340837 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 (22001222210029) 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, 152397530 + ... + 152541828.

It is an arithmetic number, because the mean of its divisors is an integer number (2751746454600).

Almost surely, 2^{22001222210021} is an apocalyptic number.

It is an amenable number.

22001222210021 is a deficient number, since it is larger than the sum of its proper divisors (12749426779).

22001222210021 is a wasteful number, since it uses less digits than its factorization.

22001222210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231595.

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

Adding to 22001222210021 its reverse (12001222210022), we get a palindrome (34002444420043).

Subtracting from 22001222210021 its reverse (12001222210022), we obtain a palindrome (9999999999999).

The spelling of 22001222210021 in words is "twenty-two trillion, one billion, two hundred twenty-two million, two hundred ten thousand, twenty-one".