12323303021 has 4 divisors (see below), whose sum is σ = 12525324444. Its totient is φ = 12121281600.

The previous prime is 12323303011. The next prime is 12323303033. The reversal of 12323303021 is 12030332321.

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 1521858121 + 10801444900 = 39011^2 + 103930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12323303021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12323302984 and 12323303002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12323303011) 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, 101010620 + ... + 101010741.

It is an arithmetic number, because the mean of its divisors is an integer number (3131331111).

Almost surely, 2^12323303021 is an apocalyptic number.

It is an amenable number.

12323303021 is a deficient number, since it is larger than the sum of its proper divisors (202021423).

12323303021 is an equidigital number, since it uses as much as digits as its factorization.

12323303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202021422.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 12323303021 its reverse (12030332321), we get a palindrome (24353635342).

The spelling of 12323303021 in words is "twelve billion, three hundred twenty-three million, three hundred three thousand, twenty-one".