22204121 has 2 divisors, whose sum is σ = 22204122. Its totient is φ = 22204120.

The previous prime is 22204109. The next prime is 22204139. The reversal of 22204121 is 12140222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19758025 + 2446096 = 4445^2 + 1564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22204121 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22204096 and 22204105.

It is not a weakly prime, because it can be changed into another prime (22204151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11102060 + 11102061.

It is an arithmetic number, because the mean of its divisors is an integer number (11102061).

Almost surely, 2^22204121 is an apocalyptic number.

It is an amenable number.

22204121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22204121 is an equidigital number, since it uses as much as digits as its factorization.

22204121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 22204121 is about 4712.1248922328. The cubic root of 22204121 is about 281.0678652208.

Adding to 22204121 its reverse (12140222), we get a palindrome (34344343).

The spelling of 22204121 in words is "twenty-two million, two hundred four thousand, one hundred twenty-one".