12216305676 has 24 divisors (see below), whose sum is σ = 29167614784. Its totient is φ = 3977401680.

The previous prime is 12216305671. The next prime is 12216305713. The reversal of 12216305676 is 67650361221.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12216305671) 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 in 7 ways as a sum of consecutive naturals, for example, 11836990 + ... + 11838021.

Almost surely, 2^12216305676 is an apocalyptic number.

It is an amenable number.

12216305676 is an abundant number, since it is smaller than the sum of its proper divisors (16951309108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12216305676 is a wasteful number, since it uses less digits than its factorization.

12216305676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23675061 (or 23675059 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

Adding to 12216305676 its reverse (67650361221), we get a palindrome (79866666897).

The spelling of 12216305676 in words is "twelve billion, two hundred sixteen million, three hundred five thousand, six hundred seventy-six".