12216385849 has 2 divisors, whose sum is σ = 12216385850. Its totient is φ = 12216385848.

The previous prime is 12216385829. The next prime is 12216385889. The reversal of 12216385849 is 94858361221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12164545849 + 51840000 = 110293^2 + 7200^2 .

It is a cyclic number.

It is not a de Polignac number, because 12216385849 - 2¹⁷ = 12216254777 is a prime.

It is not a weakly prime, because it can be changed into another prime (12216385829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108192924 + 6108192925.

It is an arithmetic number, because the mean of its divisors is an integer number (6108192925).

Almost surely, 2^12216385849 is an apocalyptic number.

It is an amenable number.

12216385849 is a deficient number, since it is larger than the sum of its proper divisors (1).

12216385849 is an equidigital number, since it uses as much as digits as its factorization.

12216385849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 49.

The spelling of 12216385849 in words is "twelve billion, two hundred sixteen million, three hundred eighty-five thousand, eight hundred forty-nine".