12403230221 has 4 divisors (see below), whose sum is σ = 12409455612. Its totient is φ = 12397004832.

The previous prime is 12403230211. The next prime is 12403230253. The reversal of 12403230221 is 12203230421.

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 4018165321 + 8385064900 = 63389^2 + 91570^2 .

It is a cyclic number.

It is not a de Polignac number, because 12403230221 - 2¹⁰ = 12403229197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12403230193 and 12403230202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403230211) 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, 3109706 + ... + 3113691.

It is an arithmetic number, because the mean of its divisors is an integer number (3102363903).

Almost surely, 2^12403230221 is an apocalyptic number.

It is an amenable number.

12403230221 is a deficient number, since it is larger than the sum of its proper divisors (6225391).

12403230221 is an equidigital number, since it uses as much as digits as its factorization.

12403230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6225390.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12403230221 its reverse (12203230421), we get a palindrome (24606460642).

The spelling of 12403230221 in words is "twelve billion, four hundred three million, two hundred thirty thousand, two hundred twenty-one".