12013332321 has 4 divisors (see below), whose sum is σ = 16017776432. Its totient is φ = 8008888212.

The previous prime is 12013332313. The next prime is 12013332323. The reversal of 12013332321 is 12323331021.

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 not a de Polignac number, because 12013332321 - 2³ = 12013332313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013332323) 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, 2002222051 + ... + 2002222056.

It is an arithmetic number, because the mean of its divisors is an integer number (4004444108).

Almost surely, 2^12013332321 is an apocalyptic number.

It is an amenable number.

12013332321 is a deficient number, since it is larger than the sum of its proper divisors (4004444111).

12013332321 is an equidigital number, since it uses as much as digits as its factorization.

12013332321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004444110.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12013332321 its reverse (12323331021), we get a palindrome (24336663342).

The spelling of 12013332321 in words is "twelve billion, thirteen million, three hundred thirty-two thousand, three hundred twenty-one".