12013000321 has 4 divisors (see below), whose sum is σ = 13729143232. Its totient is φ = 10296857412.

The previous prime is 12013000319. The next prime is 12013000327. The reversal of 12013000321 is 12300031021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12300031021 = 53 ⋅232076057.

It is a cyclic number.

It is not a de Polignac number, because 12013000321 - 2¹ = 12013000319 is a prime.

It is a super-2 number, since 2×12013000321² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12013000327) 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, 858071445 + ... + 858071458.

It is an arithmetic number, because the mean of its divisors is an integer number (3432285808).

Almost surely, 2^12013000321 is an apocalyptic number.

It is an amenable number.

12013000321 is a deficient number, since it is larger than the sum of its proper divisors (1716142911).

12013000321 is an equidigital number, since it uses as much as digits as its factorization.

12013000321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716142910.

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

Adding to 12013000321 its reverse (12300031021), we get a palindrome (24313031342).

The spelling of 12013000321 in words is "twelve billion, thirteen million, three hundred twenty-one", and thus it is an aban number.