12013221323 has 4 divisors (see below), whose sum is σ = 12034334760. Its totient is φ = 11992107888.

The previous prime is 12013221301. The next prime is 12013221331. The reversal of 12013221323 is 32312231021.

12013221323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32312231021 = 7 ⋅4616033003.

It is a cyclic number.

It is not a de Polignac number, because 12013221323 - 2²⁰ = 12012172747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12013221295 and 12013221304.

It is not an unprimeable number, because it can be changed into a prime (12013221823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10555865 + ... + 10557002.

It is an arithmetic number, because the mean of its divisors is an integer number (3008583690).

Almost surely, 2^12013221323 is an apocalyptic number.

12013221323 is a deficient number, since it is larger than the sum of its proper divisors (21113437).

12013221323 is an equidigital number, since it uses as much as digits as its factorization.

12013221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21113436.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12013221323 its reverse (32312231021), we get a palindrome (44325452344).

The spelling of 12013221323 in words is "twelve billion, thirteen million, two hundred twenty-one thousand, three hundred twenty-three".