13344112421 has 2 divisors, whose sum is σ = 13344112422. Its totient is φ = 13344112420.

The previous prime is 13344112399. The next prime is 13344112487. The reversal of 13344112421 is 12421144331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12591981796 + 752130625 = 112214^2 + 27425^2 .

It is a cyclic number.

It is not a de Polignac number, because 13344112421 - 2¹⁰ = 13344111397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13344112721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6672056210 + 6672056211.

It is an arithmetic number, because the mean of its divisors is an integer number (6672056211).

Almost surely, 2^13344112421 is an apocalyptic number.

It is an amenable number.

13344112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13344112421 is an equidigital number, since it uses as much as digits as its factorization.

13344112421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

Adding to 13344112421 its reverse (12421144331), we get a palindrome (25765256752).

The spelling of 13344112421 in words is "thirteen billion, three hundred forty-four million, one hundred twelve thousand, four hundred twenty-one".