22121137 has 2 divisors, whose sum is σ = 22121138. Its totient is φ = 22121136.

The previous prime is 22121089. The next prime is 22121159. The reversal of 22121137 is 73112122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13024881 + 9096256 = 3609^2 + 3016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121137 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060568 + 11060569.

It is an arithmetic number, because the mean of its divisors is an integer number (11060569).

Almost surely, 2^22121137 is an apocalyptic number.

It is an amenable number.

22121137 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121137 is an equidigital number, since it uses as much as digits as its factorization.

22121137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 19.

The square root of 22121137 is about 4703.3112803641. The cubic root of 22121137 is about 280.7172808581.

Adding to 22121137 its reverse (73112122), we get a palindrome (95233259).

The spelling of 22121137 in words is "twenty-two million, one hundred twenty-one thousand, one hundred thirty-seven".