12023323021 has 16 divisors (see below), whose sum is σ = 12418016688. Its totient is φ = 11633804800.

The previous prime is 12023322959. The next prime is 12023323027. The reversal of 12023323021 is 12032332021.

12023323021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 8094025 + 12015228996 = 2845^2 + 109614^2 .

It is a cyclic number.

It is not a de Polignac number, because 12023323021 - 2²³ = 12014934413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12023323021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023323027) 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 15 ways as a sum of consecutive naturals, for example, 3268035 + ... + 3271711.

It is an arithmetic number, because the mean of its divisors is an integer number (776126043).

Almost surely, 2^12023323021 is an apocalyptic number.

It is an amenable number.

12023323021 is a deficient number, since it is larger than the sum of its proper divisors (394693667).

12023323021 is a wasteful number, since it uses less digits than its factorization.

12023323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 12023323021 its reverse (12032332021), we get a palindrome (24055655042).

The spelling of 12023323021 in words is "twelve billion, twenty-three million, three hundred twenty-three thousand, twenty-one".