321231321121 has 4 divisors (see below), whose sum is σ = 321845530672. Its totient is φ = 320617111572.

The previous prime is 321231321113. The next prime is 321231321127. The reversal of 321231321121 is 121123132123.

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 321231321121 - 2³ = 321231321113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321231321092 and 321231321101.

It is not an unprimeable number, because it can be changed into a prime (321231321127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307103991 + ... + 307105036.

It is an arithmetic number, because the mean of its divisors is an integer number (80461382668).

Almost surely, 2^321231321121 is an apocalyptic number.

It is an amenable number.

321231321121 is a deficient number, since it is larger than the sum of its proper divisors (614209551).

321231321121 is an equidigital number, since it uses as much as digits as its factorization.

321231321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614209550.

The product of its digits is 432, while the sum is 22.

Adding to 321231321121 its reverse (121123132123), we get a palindrome (442354453244).

The spelling of 321231321121 in words is "three hundred twenty-one billion, two hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty-one".