12443230420409 has 2 divisors, whose sum is σ = 12443230420410. Its totient is φ = 12443230420408.

The previous prime is 12443230420393. The next prime is 12443230420441. The reversal of 12443230420409 is 90402403234421.

It is a happy number.

12443230420409 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., 9795867127225 + 2647363293184 = 3129835^2 + 1627072^2 .

It is an emirp because it is prime and its reverse (90402403234421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12443230420409 - 2⁴ = 12443230420393 is a prime.

It is not a weakly prime, because it can be changed into another prime (12443230420459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221615210204 + 6221615210205.

It is an arithmetic number, because the mean of its divisors is an integer number (6221615210205).

Almost surely, 2^{12443230420409} is an apocalyptic number.

It is an amenable number.

12443230420409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443230420409 is an equidigital number, since it uses as much as digits as its factorization.

12443230420409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 12443230420409 in words is "twelve trillion, four hundred forty-three billion, two hundred thirty million, four hundred twenty thousand, four hundred nine".