12434432221 has 4 divisors (see below), whose sum is σ = 12449253600. Its totient is φ = 12419610844.

The previous prime is 12434432203. The next prime is 12434432239. The reversal of 12434432221 is 12223443421.

12434432221 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 an interprime number because it is at equal distance from previous prime (12434432203) and next prime (12434432239).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12434432221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12434432221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12434432261) 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, 7409431 + ... + 7411108.

It is an arithmetic number, because the mean of its divisors is an integer number (3112313400).

Almost surely, 2^12434432221 is an apocalyptic number.

It is an amenable number.

12434432221 is a deficient number, since it is larger than the sum of its proper divisors (14821379).

12434432221 is an equidigital number, since it uses as much as digits as its factorization.

12434432221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14821378.

The product of its digits is 9216, while the sum is 28.

Adding to 12434432221 its reverse (12223443421), we get a palindrome (24657875642).

The spelling of 12434432221 in words is "twelve billion, four hundred thirty-four million, four hundred thirty-two thousand, two hundred twenty-one".