12216662542 has 32 divisors (see below), whose sum is σ = 21280896000. Its totient is φ = 5151657888.

The previous prime is 12216662537. The next prime is 12216662567. The reversal of 12216662542 is 24526661221.

It is a happy number.

12216662542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 305209 + ... + 342907.

It is an arithmetic number, because the mean of its divisors is an integer number (665028000).

Almost surely, 2^12216662542 is an apocalyptic number.

12216662542 is a deficient number, since it is larger than the sum of its proper divisors (9064233458).

12216662542 is a wasteful number, since it uses less digits than its factorization.

12216662542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38080.

The product of its digits is 69120, while the sum is 37.

The spelling of 12216662542 in words is "twelve billion, two hundred sixteen million, six hundred sixty-two thousand, five hundred forty-two".