12216542387 has 8 divisors (see below), whose sum is σ = 13972358400. Its totient is φ = 10463375304.

The previous prime is 12216542381. The next prime is 12216542389. The reversal of 12216542387 is 78324561221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12216542387 - 2⁸ = 12216542131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12216542381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652337 + ... + 670802.

It is an arithmetic number, because the mean of its divisors is an integer number (1746544800).

Almost surely, 2^12216542387 is an apocalyptic number.

12216542387 is a deficient number, since it is larger than the sum of its proper divisors (1755816013).

12216542387 is a wasteful number, since it uses less digits than its factorization.

12216542387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324465.

The product of its digits is 161280, while the sum is 41.

The spelling of 12216542387 in words is "twelve billion, two hundred sixteen million, five hundred forty-two thousand, three hundred eighty-seven".