22090121 has 2 divisors, whose sum is σ = 22090122. Its totient is φ = 22090120.

The previous prime is 22090111. The next prime is 22090127. The reversal of 22090121 is 12109022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22090000 + 121 = 4700^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 22090121 - 2¹⁸ = 21827977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22090121.

It is not a weakly prime, because it can be changed into another prime (22090127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11045060 + 11045061.

It is an arithmetic number, because the mean of its divisors is an integer number (11045061).

Almost surely, 2^22090121 is an apocalyptic number.

It is an amenable number.

22090121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22090121 is an equidigital number, since it uses as much as digits as its factorization.

22090121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 22090121 is about 4700.0128723228. The cubic root of 22090121 is about 280.5860217885.

Adding to 22090121 its reverse (12109022), we get a palindrome (34199143).

The spelling of 22090121 in words is "twenty-two million, ninety thousand, one hundred twenty-one".