12173321999 has 2 divisors, whose sum is σ = 12173322000. Its totient is φ = 12173321998.

The previous prime is 12173321989. The next prime is 12173322037. The reversal of 12173321999 is 99912337121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12173321999 - 2¹² = 12173317903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12173321939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086660999 + 6086661000.

It is an arithmetic number, because the mean of its divisors is an integer number (6086661000).

Almost surely, 2^12173321999 is an apocalyptic number.

12173321999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12173321999 is an equidigital number, since it uses as much as digits as its factorization.

12173321999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 47.

The spelling of 12173321999 in words is "twelve billion, one hundred seventy-three million, three hundred twenty-one thousand, nine hundred ninety-nine".