12219116857 has 2 divisors, whose sum is σ = 12219116858. Its totient is φ = 12219116856.

The previous prime is 12219116849. The next prime is 12219116863. The reversal of 12219116857 is 75861191221.

12219116857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11164880896 + 1054235961 = 105664^2 + 32469^2 .

It is a cyclic number.

It is not a de Polignac number, because 12219116857 - 2³ = 12219116849 is a prime.

It is not a weakly prime, because it can be changed into another prime (12219116807) by changing a digit.

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 as a sum of consecutive naturals, namely, 6109558428 + 6109558429.

It is an arithmetic number, because the mean of its divisors is an integer number (6109558429).

Almost surely, 2^12219116857 is an apocalyptic number.

It is an amenable number.

12219116857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12219116857 is an equidigital number, since it uses as much as digits as its factorization.

12219116857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 43.

The spelling of 12219116857 in words is "twelve billion, two hundred nineteen million, one hundred sixteen thousand, eight hundred fifty-seven".