12315448081 has 2 divisors, whose sum is σ = 12315448082. Its totient is φ = 12315448080.

The previous prime is 12315448073. The next prime is 12315448087. The reversal of 12315448081 is 18084451321.

12315448081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9459507600 + 2855940481 = 97260^2 + 53441^2 .

It is an emirp because it is prime and its reverse (18084451321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12315448081 - 2³ = 12315448073 is a prime.

It is a super-2 number, since 2×12315448081² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12315448081.

It is not a weakly prime, because it can be changed into another prime (12315448087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157724040 + 6157724041.

It is an arithmetic number, because the mean of its divisors is an integer number (6157724041).

Almost surely, 2^12315448081 is an apocalyptic number.

It is an amenable number.

12315448081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315448081 is an equidigital number, since it uses as much as digits as its factorization.

12315448081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 12315448081 in words is "twelve billion, three hundred fifteen million, four hundred forty-eight thousand, eighty-one".