12320323421 has 4 divisors (see below), whose sum is σ = 14080369632. Its totient is φ = 10560277212.

The previous prime is 12320323403. The next prime is 12320323429. The reversal of 12320323421 is 12432302321.

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 12320323421 - 2¹⁰ = 12320322397 is a prime.

It is a super-2 number, since 2×12320323421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320323429) 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, 880023095 + ... + 880023108.

It is an arithmetic number, because the mean of its divisors is an integer number (3520092408).

Almost surely, 2^12320323421 is an apocalyptic number.

It is an amenable number.

12320323421 is a deficient number, since it is larger than the sum of its proper divisors (1760046211).

12320323421 is an equidigital number, since it uses as much as digits as its factorization.

12320323421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760046210.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 12320323421 its reverse (12432302321), we get a palindrome (24752625742).

The spelling of 12320323421 in words is "twelve billion, three hundred twenty million, three hundred twenty-three thousand, four hundred twenty-one".