12023123021 has 32 divisors (see below), whose sum is σ = 15324153600. Its totient is φ = 9175057920.

The previous prime is 12023123011. The next prime is 12023123053. The reversal of 12023123021 is 12032132021.

It is a de Polignac number, because none of the positive numbers 2^k-12023123021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023123011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3405185 + ... + 3408713.

It is an arithmetic number, because the mean of its divisors is an integer number (478879800).

Almost surely, 2^12023123021 is an apocalyptic number.

It is an amenable number.

12023123021 is a deficient number, since it is larger than the sum of its proper divisors (3301030579).

12023123021 is a wasteful number, since it uses less digits than its factorization.

12023123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4869.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12023123021 its reverse (12032132021), we get a palindrome (24055255042).

The spelling of 12023123021 in words is "twelve billion, twenty-three million, one hundred twenty-three thousand, twenty-one".