12181847273 has 4 divisors (see below), whose sum is σ = 12205140048. Its totient is φ = 12158554500.

The previous prime is 12181847269. The next prime is 12181847291. The reversal of 12181847273 is 37274818121.

It is a happy number.

12181847273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37274818121 = 8069 ⋅4619509.

It is a cyclic number.

It is not a de Polignac number, because 12181847273 - 2² = 12181847269 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12181847243) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11645603 + ... + 11646648.

It is an arithmetic number, because the mean of its divisors is an integer number (3051285012).

Almost surely, 2^12181847273 is an apocalyptic number.

It is an amenable number.

12181847273 is a deficient number, since it is larger than the sum of its proper divisors (23292775).

12181847273 is an equidigital number, since it uses as much as digits as its factorization.

12181847273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23292774.

The product of its digits is 150528, while the sum is 44.

The spelling of 12181847273 in words is "twelve billion, one hundred eighty-one million, eight hundred forty-seven thousand, two hundred seventy-three".