12172165312 has 14 divisors (see below), whose sum is σ = 24154140668. Its totient is φ = 6086082624.

The previous prime is 12172165309. The next prime is 12172165319. The reversal of 12172165312 is 21356127121.

It is not an unprimeable number, because it can be changed into a prime (12172165319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95094978 + ... + 95095105.

It is an arithmetic number, because the mean of its divisors is an integer number (1725295762).

Almost surely, 2^12172165312 is an apocalyptic number.

It is an amenable number.

12172165312 is a deficient number, since it is larger than the sum of its proper divisors (11981975356).

12172165312 is an equidigital number, since it uses as much as digits as its factorization.

12172165312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190190095 (or 190190085 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The spelling of 12172165312 in words is "twelve billion, one hundred seventy-two million, one hundred sixty-five thousand, three hundred twelve".