12346664321 has 4 divisors (see below), whose sum is σ = 12347237700. Its totient is φ = 12346090944.

The previous prime is 12346664299. The next prime is 12346664327.

12346664321 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3701383921 + 8645280400 = 60839^2 + 92980^2 .

It is a cyclic number.

It is not a de Polignac number, because 12346664321 - 2¹⁰ = 12346663297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12346664327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253076 + ... + 297893.

It is an arithmetic number, because the mean of its divisors is an integer number (3086809425).

Almost surely, 2^12346664321 is an apocalyptic number.

It is an amenable number.

12346664321 is a deficient number, since it is larger than the sum of its proper divisors (573379).

12346664321 is an equidigital number, since it uses as much as digits as its factorization.

12346664321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573378.

The product of its digits is 124416, while the sum is 38.

The spelling of 12346664321 in words is "twelve billion, three hundred forty-six million, six hundred sixty-four thousand, three hundred twenty-one".