12420428281 has 2 divisors, whose sum is σ = 12420428282. Its totient is φ = 12420428280.

The previous prime is 12420428243. The next prime is 12420428323. The reversal of 12420428281 is 18282402421.

12420428281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7741184256 + 4679244025 = 87984^2 + 68405^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420428281 - 2¹¹ = 12420426233 is a prime.

It is a super-2 number, since 2×12420428281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12420428201) 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, 6210214140 + 6210214141.

It is an arithmetic number, because the mean of its divisors is an integer number (6210214141).

Almost surely, 2^12420428281 is an apocalyptic number.

It is an amenable number.

12420428281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420428281 is an equidigital number, since it uses as much as digits as its factorization.

12420428281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16384, while the sum is 34.

The spelling of 12420428281 in words is "twelve billion, four hundred twenty million, four hundred twenty-eight thousand, two hundred eighty-one".