12226665217 has 8 divisors (see below), whose sum is σ = 13941718056. Its totient is φ = 10622260992.

The previous prime is 12226665173. The next prime is 12226665257. The reversal of 12226665217 is 71256662221.

It can be written as a sum of positive squares in 4 ways, for example, as 1969229376 + 10257435841 = 44376^2 + 101279^2 .

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 12226665217 - 2¹⁹ = 12226140929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12226665217.

It is not an unprimeable number, because it can be changed into a prime (12226665257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27661918 + ... + 27662359.

It is an arithmetic number, because the mean of its divisors is an integer number (1742714757).

Almost surely, 2^12226665217 is an apocalyptic number.

12226665217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12226665217 is a deficient number, since it is larger than the sum of its proper divisors (1715052839).

12226665217 is a wasteful number, since it uses less digits than its factorization.

12226665217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55324307.

The product of its digits is 120960, while the sum is 40.

The spelling of 12226665217 in words is "twelve billion, two hundred twenty-six million, six hundred sixty-five thousand, two hundred seventeen".