12415251421 has 2 divisors, whose sum is σ = 12415251422. Its totient is φ = 12415251420.

The previous prime is 12415251413. The next prime is 12415251439.

12415251421 is nontrivially palindromic in base 10.

12415251421 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., 8026188921 + 4389062500 = 89589^2 + 66250^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 12415251421 - 2³ = 12415251413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12415251421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12415251461) 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, 6207625710 + 6207625711.

It is an arithmetic number, because the mean of its divisors is an integer number (6207625711).

Almost surely, 2^12415251421 is an apocalyptic number.

It is an amenable number.

12415251421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12415251421 is an equidigital number, since it uses as much as digits as its factorization.

12415251421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3200, while the sum is 28.

The spelling of 12415251421 in words is "twelve billion, four hundred fifteen million, two hundred fifty-one thousand, four hundred twenty-one".