12321414515621 has 2 divisors, whose sum is σ = 12321414515622. Its totient is φ = 12321414515620.

The previous prime is 12321414515539. The next prime is 12321414515741. The reversal of 12321414515621 is 12651541412321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9541488544900 + 2779925970721 = 3088930^2 + 1667311^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321414515621 - 2²⁶ = 12321347406757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12321414575621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160707257810 + 6160707257811.

It is an arithmetic number, because the mean of its divisors is an integer number (6160707257811).

Almost surely, 2^{12321414515621} is an apocalyptic number.

It is an amenable number.

12321414515621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321414515621 is an equidigital number, since it uses as much as digits as its factorization.

12321414515621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 38.

Adding to 12321414515621 its reverse (12651541412321), we get a palindrome (24972955927942).

The spelling of 12321414515621 in words is "twelve trillion, three hundred twenty-one billion, four hundred fourteen million, five hundred fifteen thousand, six hundred twenty-one".