22245121 has 2 divisors, whose sum is σ = 22245122. Its totient is φ = 22245120.

The previous prime is 22245109. The next prime is 22245127. The reversal of 22245121 is 12154222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17338896 + 4906225 = 4164^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 22245121 - 2⁵ = 22245089 is a prime.

It is not a weakly prime, because it can be changed into another prime (22245127) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11122560 + 11122561.

It is an arithmetic number, because the mean of its divisors is an integer number (11122561).

Almost surely, 2^22245121 is an apocalyptic number.

It is an amenable number.

22245121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22245121 is an equidigital number, since it uses as much as digits as its factorization.

22245121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 19.

The square root of 22245121 is about 4716.4733647080. The cubic root of 22245121 is about 281.2407565028.

Adding to 22245121 its reverse (12154222), we get a palindrome (34399343).

It can be divided in two parts, 22245 and 121, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 22245121 in words is "twenty-two million, two hundred forty-five thousand, one hundred twenty-one".