12321013302661 has 4 divisors (see below), whose sum is σ = 14081158060192. Its totient is φ = 10560868545132.

The previous prime is 12321013302649. The next prime is 12321013302667. The reversal of 12321013302661 is 16620331012321.

12321013302661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12321013302661 - 2¹⁷ = 12321013171589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321013302667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880072378755 + ... + 880072378768.

It is an arithmetic number, because the mean of its divisors is an integer number (3520289515048).

Almost surely, 2^{12321013302661} is an apocalyptic number.

It is an amenable number.

12321013302661 is a deficient number, since it is larger than the sum of its proper divisors (1760144757531).

12321013302661 is an equidigital number, since it uses as much as digits as its factorization.

12321013302661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760144757530.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 12321013302661 its reverse (16620331012321), we get a palindrome (28941344314982).

The spelling of 12321013302661 in words is "twelve trillion, three hundred twenty-one billion, thirteen million, three hundred two thousand, six hundred sixty-one".