321322312321 has 4 divisors (see below), whose sum is σ = 328158957312. Its totient is φ = 314485667332.

The previous prime is 321322312277. The next prime is 321322312327. The reversal of 321322312321 is 123213223123.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123213223123 = 16073 ⋅7665851.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321322312321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321322312327) 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, 3418322425 + ... + 3418322518.

It is an arithmetic number, because the mean of its divisors is an integer number (82039739328).

Almost surely, 2^321322312321 is an apocalyptic number.

It is an amenable number.

321322312321 is a deficient number, since it is larger than the sum of its proper divisors (6836644991).

321322312321 is an equidigital number, since it uses as much as digits as its factorization.

321322312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6836644990.

The product of its digits is 2592, while the sum is 25.

Adding to 321322312321 its reverse (123213223123), we get a palindrome (444535535444).

The spelling of 321322312321 in words is "three hundred twenty-one billion, three hundred twenty-two million, three hundred twelve thousand, three hundred twenty-one".