12442368821 has 2 divisors, whose sum is σ = 12442368822. Its totient is φ = 12442368820.

The previous prime is 12442368803. The next prime is 12442368839. The reversal of 12442368821 is 12886324421.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (12442368803) and next prime (12442368839).

It can be written as a sum of positive squares in only one way, i.e., 12442287025 + 81796 = 111545^2 + 286^2 .

It is an emirp because it is prime and its reverse (12886324421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12442368821 - 2¹⁴ = 12442352437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12442368721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221184410 + 6221184411.

It is an arithmetic number, because the mean of its divisors is an integer number (6221184411).

Almost surely, 2^12442368821 is an apocalyptic number.

It is an amenable number.

12442368821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12442368821 is an equidigital number, since it uses as much as digits as its factorization.

12442368821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147456, while the sum is 41.

The spelling of 12442368821 in words is "twelve billion, four hundred forty-two million, three hundred sixty-eight thousand, eight hundred twenty-one".