22004500121 has 2 divisors, whose sum is σ = 22004500122. Its totient is φ = 22004500120.

The previous prime is 22004500087. The next prime is 22004500129. The reversal of 22004500121 is 12100540022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22003568896 + 931225 = 148336^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 22004500121 - 2³⁰ = 20930758297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22004500121.

It is not a weakly prime, because it can be changed into another prime (22004500129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11002250060 + 11002250061.

It is an arithmetic number, because the mean of its divisors is an integer number (11002250061).

Almost surely, 2^22004500121 is an apocalyptic number.

It is an amenable number.

22004500121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22004500121 is an equidigital number, since it uses as much as digits as its factorization.

22004500121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The spelling of 22004500121 in words is "twenty-two billion, four million, five hundred thousand, one hundred twenty-one".