22122210021 has 16 divisors (see below), whose sum is σ = 29625108480. Its totient is φ = 14683790000.

The previous prime is 22122210001. The next prime is 22122210079. The reversal of 22122210021 is 12001222122.

It is a cyclic number.

It is not a de Polignac number, because 22122210021 - 2⁹ = 22122209509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122210001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1601896 + ... + 1615646.

It is an arithmetic number, because the mean of its divisors is an integer number (1851569280).

Almost surely, 2^22122210021 is an apocalyptic number.

It is an amenable number.

22122210021 is a deficient number, since it is larger than the sum of its proper divisors (7502898459).

22122210021 is a wasteful number, since it uses less digits than its factorization.

22122210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16056.

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

Adding to 22122210021 its reverse (12001222122), we get a palindrome (34123432143).

The spelling of 22122210021 in words is "twenty-two billion, one hundred twenty-two million, two hundred ten thousand, twenty-one".