22540121 has 2 divisors, whose sum is σ = 22540122. Its totient is φ = 22540120.

The previous prime is 22540097. The next prime is 22540153. The reversal of 22540121 is 12104522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16483600 + 6056521 = 4060^2 + 2461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22540121 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22540121.

It is not a weakly prime, because it can be changed into another prime (22540421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11270060 + 11270061.

It is an arithmetic number, because the mean of its divisors is an integer number (11270061).

Almost surely, 2^22540121 is an apocalyptic number.

It is an amenable number.

22540121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22540121 is an equidigital number, since it uses as much as digits as its factorization.

22540121 is an odious number, because the sum of its binary digits is odd.

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

The square root of 22540121 is about 4747.6437313682. The cubic root of 22540121 is about 282.4785103866.

Adding to 22540121 its reverse (12104522), we get a palindrome (34644643).

The spelling of 22540121 in words is "twenty-two million, five hundred forty thousand, one hundred twenty-one".