12321666047 has 2 divisors, whose sum is σ = 12321666048. Its totient is φ = 12321666046.

The previous prime is 12321666001. The next prime is 12321666083. The reversal of 12321666047 is 74066612321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12321666047 - 2²² = 12317471743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12321666047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12321666647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160833023 + 6160833024.

It is an arithmetic number, because the mean of its divisors is an integer number (6160833024).

Almost surely, 2^12321666047 is an apocalyptic number.

12321666047 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321666047 is an equidigital number, since it uses as much as digits as its factorization.

12321666047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

Subtracting from 12321666047 its sum of digits (38), we obtain a square (12321666009 = 111003²).

The spelling of 12321666047 in words is "twelve billion, three hundred twenty-one million, six hundred sixty-six thousand, forty-seven".