12623306647421 has 2 divisors, whose sum is σ = 12623306647422. Its totient is φ = 12623306647420.

The previous prime is 12623306647397. The next prime is 12623306647481. The reversal of 12623306647421 is 12474660332621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12280742263321 + 342564384100 = 3504389^2 + 585290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12623306647421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12623306647481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6311653323710 + 6311653323711.

It is an arithmetic number, because the mean of its divisors is an integer number (6311653323711).

Almost surely, 2^{12623306647421} is an apocalyptic number.

It is an amenable number.

12623306647421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12623306647421 is an equidigital number, since it uses as much as digits as its factorization.

12623306647421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 12623306647421 in words is "twelve trillion, six hundred twenty-three billion, three hundred six million, six hundred forty-seven thousand, four hundred twenty-one".