12661303321 has 8 divisors (see below), whose sum is σ = 12716587520. Its totient is φ = 12606124608.

The previous prime is 12661303313. The next prime is 12661303331. The reversal of 12661303321 is 12330316621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12661303321 - 2³ = 12661303313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12661303321.

It is not an unprimeable number, because it can be changed into a prime (12661303301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219160 + ... + 270838.

It is an arithmetic number, because the mean of its divisors is an integer number (1589573440).

Almost surely, 2^12661303321 is an apocalyptic number.

It is an amenable number.

12661303321 is a deficient number, since it is larger than the sum of its proper divisors (55284199).

12661303321 is an equidigital number, since it uses as much as digits as its factorization.

12661303321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52743.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 12661303321 its reverse (12330316621), we get a palindrome (24991619942).

The spelling of 12661303321 in words is "twelve billion, six hundred sixty-one million, three hundred three thousand, three hundred twenty-one".