12216208267 has 8 divisors (see below), whose sum is σ = 12566668400. Its totient is φ = 11866816224.

The previous prime is 12216208261. The next prime is 12216208271. The reversal of 12216208267 is 76280261221.

It is a happy number.

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 12216208267 - 2⁷ = 12216208139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12216208261) 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, 243792 + ... + 289597.

It is an arithmetic number, because the mean of its divisors is an integer number (1570833550).

Almost surely, 2^12216208267 is an apocalyptic number.

12216208267 is a deficient number, since it is larger than the sum of its proper divisors (350460133).

12216208267 is an equidigital number, since it uses as much as digits as its factorization.

12216208267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534045.

The product of its (nonzero) digits is 32256, while the sum is 37.

Adding to 12216208267 its reverse (76280261221), we get a palindrome (88496469488).

The spelling of 12216208267 in words is "twelve billion, two hundred sixteen million, two hundred eight thousand, two hundred sixty-seven".