12533221513266 has 32 divisors (see below), whose sum is σ = 25091846281728. Its totient is φ = 4173508765440.

The previous prime is 12533221513229. The next prime is 12533221513331. The reversal of 12533221513266 is 66231512233521.

12533221513266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23371900 + ... + 23902136.

It is an arithmetic number, because the mean of its divisors is an integer number (784120196304).

Almost surely, 2^{12533221513266} is an apocalyptic number.

12533221513266 is an abundant number, since it is smaller than the sum of its proper divisors (12558624768462).

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

12533221513266 is a wasteful number, since it uses less digits than its factorization.

12533221513266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534226.

The product of its digits is 388800, while the sum is 42.

Adding to 12533221513266 its reverse (66231512233521), we get a palindrome (78764733746787).

The spelling of 12533221513266 in words is "twelve trillion, five hundred thirty-three billion, two hundred twenty-one million, five hundred thirteen thousand, two hundred sixty-six".