12323220320221 has 4 divisors (see below), whose sum is σ = 12323248501212. Its totient is φ = 12323192139232.

The previous prime is 12323220320219. The next prime is 12323220320233. The reversal of 12323220320221 is 12202302232321.

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 3045073860196 + 9278146460025 = 1745014^2 + 3046005^2 .

It is a cyclic number.

It is not a de Polignac number, because 12323220320221 - 2¹ = 12323220320219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13424056 + ... + 14312641.

It is an arithmetic number, because the mean of its divisors is an integer number (3080812125303).

Almost surely, 2^{12323220320221} is an apocalyptic number.

It is an amenable number.

12323220320221 is a deficient number, since it is larger than the sum of its proper divisors (28180991).

12323220320221 is an equidigital number, since it uses as much as digits as its factorization.

12323220320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28180990.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 12323220320221 its reverse (12202302232321), we get a palindrome (24525522552542).

The spelling of 12323220320221 in words is "twelve trillion, three hundred twenty-three billion, two hundred twenty million, three hundred twenty thousand, two hundred twenty-one".