122501521 has 2 divisors, whose sum is σ = 122501522. Its totient is φ = 122501520.

The previous prime is 122501513. The next prime is 122501537. The reversal of 122501521 is 125105221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117483921 + 5017600 = 10839^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 122501521 - 2³ = 122501513 is a prime.

It is not a weakly prime, because it can be changed into another prime (122501501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61250760 + 61250761.

It is an arithmetic number, because the mean of its divisors is an integer number (61250761).

Almost surely, 2^122501521 is an apocalyptic number.

It is an amenable number.

122501521 is a deficient number, since it is larger than the sum of its proper divisors (1).

122501521 is an equidigital number, since it uses as much as digits as its factorization.

122501521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 122501521 is about 11068.0405221521. The cubic root of 122501521 is about 496.6462496800.

Adding to 122501521 its reverse (125105221), we get a palindrome (247606742).

The spelling of 122501521 in words is "one hundred twenty-two million, five hundred one thousand, five hundred twenty-one".