12366552281 has 2 divisors, whose sum is σ = 12366552282. Its totient is φ = 12366552280.

The previous prime is 12366552227. The next prime is 12366552283. The reversal of 12366552281 is 18225566321.

12366552281 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., 12366552025 + 256 = 111205^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 12366552281 - 2¹⁰ = 12366551257 is a prime.

It is a super-2 number, since 2×12366552281² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 12366552283, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12366552283) 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, 6183276140 + 6183276141.

It is an arithmetic number, because the mean of its divisors is an integer number (6183276141).

Almost surely, 2^12366552281 is an apocalyptic number.

It is an amenable number.

12366552281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12366552281 is an equidigital number, since it uses as much as digits as its factorization.

12366552281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 41.

The spelling of 12366552281 in words is "twelve billion, three hundred sixty-six million, five hundred fifty-two thousand, two hundred eighty-one".