13221029 has 2 divisors, whose sum is σ = 13221030. Its totient is φ = 13221028.

The previous prime is 13221011. The next prime is 13221031. The reversal of 13221029 is 92012231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12888100 + 332929 = 3590^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221029 - 2⁸ = 13220773 is a prime.

Together with 13221031, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13221029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221059) 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 as a sum of consecutive naturals, namely, 6610514 + 6610515.

It is an arithmetic number, because the mean of its divisors is an integer number (6610515).

Almost surely, 2^13221029 is an apocalyptic number.

It is an amenable number.

13221029 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221029 is an equidigital number, since it uses as much as digits as its factorization.

13221029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 13221029 is about 3636.0732940908. The cubic root of 13221029 is about 236.4585847647.

The spelling of 13221029 in words is "thirteen million, two hundred twenty-one thousand, twenty-nine".