12172173381205 has 8 divisors (see below), whose sum is σ = 14718108883104. Its totient is φ = 9663404821200.

The previous prime is 12172173381169. The next prime is 12172173381239. The reversal of 12172173381205 is 50218337127121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12172173381205 - 2²⁵ = 12172139826773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9291734751 + ... + 9291736060.

It is an arithmetic number, because the mean of its divisors is an integer number (1839763610388).

Almost surely, 2^{12172173381205} is an apocalyptic number.

It is an amenable number.

12172173381205 is a deficient number, since it is larger than the sum of its proper divisors (2545935501899).

12172173381205 is a wasteful number, since it uses less digits than its factorization.

12172173381205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18583470947.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 12172173381205 in words is "twelve trillion, one hundred seventy-two billion, one hundred seventy-three million, three hundred eighty-one thousand, two hundred five".