12013321321 has 4 divisors (see below), whose sum is σ = 12079693444. Its totient is φ = 11946949200.

The previous prime is 12013321297. The next prime is 12013321363. The reversal of 12013321321 is 12312331021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3935805696 + 8077515625 = 62736^2 + 89875^2 .

It is a cyclic number.

It is not a de Polignac number, because 12013321321 - 2⁵ = 12013321289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013321721) 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, 33185790 + ... + 33186151.

It is an arithmetic number, because the mean of its divisors is an integer number (3019923361).

Almost surely, 2^12013321321 is an apocalyptic number.

It is an amenable number.

12013321321 is a deficient number, since it is larger than the sum of its proper divisors (66372123).

12013321321 is an equidigital number, since it uses as much as digits as its factorization.

12013321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66372122.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12013321321 its reverse (12312331021), we get a palindrome (24325652342).

The spelling of 12013321321 in words is "twelve billion, thirteen million, three hundred twenty-one thousand, three hundred twenty-one".