12130321 has 4 divisors (see below), whose sum is σ = 13863232. Its totient is φ = 10397412.

The previous prime is 12130319. The next prime is 12130351. The reversal of 12130321 is 12303121.

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 12130321 - 2¹ = 12130319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12130351) 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, 866445 + ... + 866458.

It is an arithmetic number, because the mean of its divisors is an integer number (3465808).

Almost surely, 2^12130321 is an apocalyptic number.

It is an amenable number.

12130321 is a deficient number, since it is larger than the sum of its proper divisors (1732911).

12130321 is an equidigital number, since it uses as much as digits as its factorization.

12130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732910.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 12130321 is about 3482.8610365618. The cubic root of 12130321 is about 229.7686457484.

Adding to 12130321 its reverse (12303121), we get a palindrome (24433442).

The spelling of 12130321 in words is "twelve million, one hundred thirty thousand, three hundred twenty-one".