12221065520226 has 24 divisors (see below), whose sum is σ = 27124803961164. Its totient is φ = 3974330250240.

The previous prime is 12221065520159. The next prime is 12221065520227. The reversal of 12221065520226 is 62202556012221.

12221065520226 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 106 + 5 + 520 + 2 + 26 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10090793913201 + 2130271607025 = 3176601^2 + 1459545^2 .

It is not an unprimeable number, because it can be changed into a prime (12221065520227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8279853951 + ... + 8279855426.

Almost surely, 2^{12221065520226} is an apocalyptic number.

12221065520226 is an abundant number, since it is smaller than the sum of its proper divisors (14903738440938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221065520226 is a wasteful number, since it uses less digits than its factorization.

12221065520226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16559709426 (or 16559709423 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 12221065520226 in words is "twelve trillion, two hundred twenty-one billion, sixty-five million, five hundred twenty thousand, two hundred twenty-six".