12181816341203 has 4 divisors (see below), whose sum is σ = 12191208645000. Its totient is φ = 12172424037408.

The previous prime is 12181816341199. The next prime is 12181816341209. The reversal of 12181816341203 is 30214361818121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12181816341203 - 2² = 12181816341199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12181816341209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4696149953 + ... + 4696152546.

It is an arithmetic number, because the mean of its divisors is an integer number (3047802161250).

Almost surely, 2^{12181816341203} is an apocalyptic number.

12181816341203 is a deficient number, since it is larger than the sum of its proper divisors (9392303797).

12181816341203 is an equidigital number, since it uses as much as digits as its factorization.

12181816341203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9392303796.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 12181816341203 in words is "twelve trillion, one hundred eighty-one billion, eight hundred sixteen million, three hundred forty-one thousand, two hundred three".