122312521 has 2 divisors, whose sum is σ = 122312522. Its totient is φ = 122312520.

The previous prime is 122312513. The next prime is 122312549. The reversal of 122312521 is 125213221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81812025 + 40500496 = 9045^2 + 6364^2 .

It is a cyclic number.

It is not a de Polignac number, because 122312521 - 2³ = 122312513 is a prime.

It is not a weakly prime, because it can be changed into another prime (122312581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61156260 + 61156261.

It is an arithmetic number, because the mean of its divisors is an integer number (61156261).

Almost surely, 2^122312521 is an apocalyptic number.

It is an amenable number.

122312521 is a deficient number, since it is larger than the sum of its proper divisors (1).

122312521 is an equidigital number, since it uses as much as digits as its factorization.

122312521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 19.

The square root of 122312521 is about 11059.4991297075. The cubic root of 122312521 is about 496.3907033127.

Adding to 122312521 its reverse (125213221), we get a palindrome (247525742).

The spelling of 122312521 in words is "one hundred twenty-two million, three hundred twelve thousand, five hundred twenty-one".