22315121 has 2 divisors, whose sum is σ = 22315122. Its totient is φ = 22315120.

The previous prime is 22315099. The next prime is 22315147. The reversal of 22315121 is 12151322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16974400 + 5340721 = 4120^2 + 2311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22315121 is a prime.

It is a super-3 number, since 3×22315121³ (a number of 23 digits) contains 333 as substring.

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 22315121.

It is not a weakly prime, because it can be changed into another prime (22315021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11157560 + 11157561.

It is an arithmetic number, because the mean of its divisors is an integer number (11157561).

Almost surely, 2^22315121 is an apocalyptic number.

It is an amenable number.

22315121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22315121 is an equidigital number, since it uses as much as digits as its factorization.

22315121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 17.

The square root of 22315121 is about 4723.8883348360. Note that the first 3 decimals coincide. The cubic root of 22315121 is about 281.5354464270.

Adding to 22315121 its reverse (12151322), we get a palindrome (34466443).

The spelling of 22315121 in words is "twenty-two million, three hundred fifteen thousand, one hundred twenty-one".