12231023021 has 4 divisors (see below), whose sum is σ = 13978312032. Its totient is φ = 10483734012.

The previous prime is 12231022987. The next prime is 12231023041. The reversal of 12231023021 is 12032013221.

12231023021 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12231023021 - 2¹⁴ = 12231006637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231023041) 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, 873644495 + ... + 873644508.

It is an arithmetic number, because the mean of its divisors is an integer number (3494578008).

Almost surely, 2^12231023021 is an apocalyptic number.

It is an amenable number.

12231023021 is a deficient number, since it is larger than the sum of its proper divisors (1747289011).

12231023021 is an equidigital number, since it uses as much as digits as its factorization.

12231023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747289010.

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

Adding to 12231023021 its reverse (12032013221), we get a palindrome (24263036242).

The spelling of 12231023021 in words is "twelve billion, two hundred thirty-one million, twenty-three thousand, twenty-one".