12344512421 has 2 divisors, whose sum is σ = 12344512422. Its totient is φ = 12344512420.

The previous prime is 12344512409. The next prime is 12344512423. The reversal of 12344512421 is 12421544321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10057281796 + 2287230625 = 100286^2 + 47825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12344512421 is a prime.

Together with 12344512423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12344512423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172256210 + 6172256211.

It is an arithmetic number, because the mean of its divisors is an integer number (6172256211).

Almost surely, 2^12344512421 is an apocalyptic number.

It is an amenable number.

12344512421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12344512421 is an equidigital number, since it uses as much as digits as its factorization.

12344512421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 29.

The spelling of 12344512421 in words is "twelve billion, three hundred forty-four million, five hundred twelve thousand, four hundred twenty-one".