12216304718 has 4 divisors (see below), whose sum is σ = 18324457080. Its totient is φ = 6108152358.

The previous prime is 12216304717. The next prime is 12216304729. The reversal of 12216304718 is 81740361221.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216304717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3054076178 + ... + 3054076181.

It is an arithmetic number, because the mean of its divisors is an integer number (4581114270).

Almost surely, 2^12216304718 is an apocalyptic number.

12216304718 is a deficient number, since it is larger than the sum of its proper divisors (6108152362).

12216304718 is an equidigital number, since it uses as much as digits as its factorization.

12216304718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108152361.

The product of its (nonzero) digits is 16128, while the sum is 35.

Adding to 12216304718 its reverse (81740361221), we get a palindrome (93956665939).

The spelling of 12216304718 in words is "twelve billion, two hundred sixteen million, three hundred four thousand, seven hundred eighteen".