12231211309 has 2 divisors, whose sum is σ = 12231211310. Its totient is φ = 12231211308.

The previous prime is 12231211301. The next prime is 12231211313. The reversal of 12231211309 is 90311213221.

12231211309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7259551209 + 4971660100 = 85203^2 + 70510^2 .

It is an emirp because it is prime and its reverse (90311213221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12231211309 - 2³ = 12231211301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12231211301) 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 as a sum of consecutive naturals, namely, 6115605654 + 6115605655.

It is an arithmetic number, because the mean of its divisors is an integer number (6115605655).

Almost surely, 2^12231211309 is an apocalyptic number.

It is an amenable number.

12231211309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231211309 is an equidigital number, since it uses as much as digits as its factorization.

12231211309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 12231211309 in words is "twelve billion, two hundred thirty-one million, two hundred eleven thousand, three hundred nine".