12231011021 has 4 divisors (see below), whose sum is σ = 12232842432. Its totient is φ = 12229179612.

The previous prime is 12231011017. The next prime is 12231011069. The reversal of 12231011021 is 12011013221.

12231011021 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 12231011021 - 2² = 12231011017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12231010987 and 12231011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231011011) 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, 905651 + ... + 919056.

It is an arithmetic number, because the mean of its divisors is an integer number (3058210608).

Almost surely, 2^12231011021 is an apocalyptic number.

It is an amenable number.

12231011021 is a deficient number, since it is larger than the sum of its proper divisors (1831411).

12231011021 is an equidigital number, since it uses as much as digits as its factorization.

12231011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831410.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12231011021 its reverse (12011013221), we get a palindrome (24242024242).

It can be divided in two parts, 122310 and 11021, that added together give a palindrome (133331).

The spelling of 12231011021 in words is "twelve billion, two hundred thirty-one million, eleven thousand, twenty-one".