13227075521721 has 6 divisors (see below), whose sum is σ = 19105775753610. Its totient is φ = 8818050347808.

The previous prime is 13227075521707. The next prime is 13227075521729. The reversal of 13227075521721 is 12712557072231.

13227075521721 is a `hidden beast` number, since 1 + 3 + 2 + 2 + 70 + 7 + 552 + 1 + 7 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11595822909696 + 1631252612025 = 3405264^2 + 1277205^2 .

It is not a de Polignac number, because 13227075521721 - 2¹¹ = 13227075519673 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13227075521729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 734837528976 + ... + 734837528993.

It is an arithmetic number, because the mean of its divisors is an integer number (3184295958935).

Almost surely, 2^{13227075521721} is an apocalyptic number.

It is an amenable number.

13227075521721 is a deficient number, since it is larger than the sum of its proper divisors (5878700231889).

13227075521721 is a wasteful number, since it uses less digits than its factorization.

13227075521721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469675057975 (or 1469675057972 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 45.

The spelling of 13227075521721 in words is "thirteen trillion, two hundred twenty-seven billion, seventy-five million, five hundred twenty-one thousand, seven hundred twenty-one".