12709476421 has 2 divisors, whose sum is σ = 12709476422. Its totient is φ = 12709476420.

The previous prime is 12709476419. The next prime is 12709476443. The reversal of 12709476421 is 12467490721.

12709476421 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., 12479347521 + 230128900 = 111711^2 + 15170^2 .

It is a cyclic number.

It is not a de Polignac number, because 12709476421 - 2¹ = 12709476419 is a prime.

Together with 12709476419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12709476401) 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, 6354738210 + 6354738211.

It is an arithmetic number, because the mean of its divisors is an integer number (6354738211).

Almost surely, 2^12709476421 is an apocalyptic number.

It is an amenable number.

12709476421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12709476421 is an equidigital number, since it uses as much as digits as its factorization.

12709476421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 12709476421 in words is "twelve billion, seven hundred nine million, four hundred seventy-six thousand, four hundred twenty-one".