13224487921 has 2 divisors, whose sum is σ = 13224487922. Its totient is φ = 13224487920.

The previous prime is 13224487883. The next prime is 13224487931. The reversal of 13224487921 is 12978442231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12958634896 + 265853025 = 113836^2 + 16305^2 .

It is a cyclic number.

It is not a de Polignac number, because 13224487921 - 2²⁹ = 12687617009 is a prime.

It is not a weakly prime, because it can be changed into another prime (13224487931) 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 as a sum of consecutive naturals, namely, 6612243960 + 6612243961.

It is an arithmetic number, because the mean of its divisors is an integer number (6612243961).

Almost surely, 2^13224487921 is an apocalyptic number.

It is an amenable number.

13224487921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13224487921 is an equidigital number, since it uses as much as digits as its factorization.

13224487921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The spelling of 13224487921 in words is "thirteen billion, two hundred twenty-four million, four hundred eighty-seven thousand, nine hundred twenty-one".