12243234221 has 4 divisors (see below), whose sum is σ = 12244193244. Its totient is φ = 12242275200.

The previous prime is 12243234217. The next prime is 12243234247.

12243234221 is nontrivially palindromic in base 10.

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 5377288900 + 6865945321 = 73330^2 + 82861^2 .

It is a cyclic number.

It is not a de Polignac number, because 12243234221 - 2² = 12243234217 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 (12243834221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460100 + ... + 485981.

It is an arithmetic number, because the mean of its divisors is an integer number (3061048311).

Almost surely, 2^12243234221 is an apocalyptic number.

It is an amenable number.

12243234221 is a deficient number, since it is larger than the sum of its proper divisors (959023).

12243234221 is an equidigital number, since it uses as much as digits as its factorization.

12243234221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959022.

The product of its digits is 4608, while the sum is 26.

The spelling of 12243234221 in words is "twelve billion, two hundred forty-three million, two hundred thirty-four thousand, two hundred twenty-one".