22022100021 has 32 divisors (see below), whose sum is σ = 29873376000. Its totient is φ = 14429076480.

The previous prime is 22022099989. The next prime is 22022100029. The reversal of 22022100021 is 12000122022.

It is not a de Polignac number, because 22022100021 - 2⁵ = 22022099989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022100029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21825165 + ... + 21826173.

It is an arithmetic number, because the mean of its divisors is an integer number (933543000).

Almost surely, 2^22022100021 is an apocalyptic number.

It is an amenable number.

22022100021 is a deficient number, since it is larger than the sum of its proper divisors (7851275979).

22022100021 is a wasteful number, since it uses less digits than its factorization.

22022100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22022100021 its reverse (12000122022), we get a palindrome (34022222043).

The spelling of 22022100021 in words is "twenty-two billion, twenty-two million, one hundred thousand, twenty-one".