12507822171281 has 2 divisors, whose sum is σ = 12507822171282. Its totient is φ = 12507822171280.

The previous prime is 12507822171209. The next prime is 12507822171367. The reversal of 12507822171281 is 18217122870521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11857113749056 + 650708422225 = 3443416^2 + 806665^2 .

It is a cyclic number.

It is not a de Polignac number, because 12507822171281 - 2¹⁴ = 12507822154897 is a prime.

It is a super-2 number, since 2×12507822171281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12507822171181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253911085640 + 6253911085641.

It is an arithmetic number, because the mean of its divisors is an integer number (6253911085641).

Almost surely, 2^{12507822171281} is an apocalyptic number.

It is an amenable number.

12507822171281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12507822171281 is an equidigital number, since it uses as much as digits as its factorization.

12507822171281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250880, while the sum is 47.

The spelling of 12507822171281 in words is "twelve trillion, five hundred seven billion, eight hundred twenty-two million, one hundred seventy-one thousand, two hundred eighty-one".