321130321 has 4 divisors (see below), whose sum is σ = 328598512. Its totient is φ = 313662132.

The previous prime is 321130319. The next prime is 321130349. The reversal of 321130321 is 123031123.

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 321130321 - 2¹ = 321130319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321130295 and 321130304.

It is not an unprimeable number, because it can be changed into a prime (321130361) 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, 3734031 + ... + 3734116.

It is an arithmetic number, because the mean of its divisors is an integer number (82149628).

Almost surely, 2^321130321 is an apocalyptic number.

It is an amenable number.

321130321 is a deficient number, since it is larger than the sum of its proper divisors (7468191).

321130321 is an equidigital number, since it uses as much as digits as its factorization.

321130321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468190.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321130321 is about 17920.1094025678. The cubic root of 321130321 is about 684.7947746869.

Adding to 321130321 its reverse (123031123), we get a palindrome (444161444).

The spelling of 321130321 in words is "three hundred twenty-one million, one hundred thirty thousand, three hundred twenty-one".