12264242521 has 2 divisors, whose sum is σ = 12264242522. Its totient is φ = 12264242520.

The previous prime is 12264242513. The next prime is 12264242533. The reversal of 12264242521 is 12524246221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12257811225 + 6431296 = 110715^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 12264242521 - 2³ = 12264242513 is a prime.

It is a super-2 number, since 2×12264242521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12264242591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6132121260 + 6132121261.

It is an arithmetic number, because the mean of its divisors is an integer number (6132121261).

Almost surely, 2^12264242521 is an apocalyptic number.

It is an amenable number.

12264242521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12264242521 is an equidigital number, since it uses as much as digits as its factorization.

12264242521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 31.

Adding to 12264242521 its reverse (12524246221), we get a palindrome (24788488742).

The spelling of 12264242521 in words is "twelve billion, two hundred sixty-four million, two hundred forty-two thousand, five hundred twenty-one".