13021303221 has 12 divisors (see below), whose sum is σ = 19914934572. Its totient is φ = 8170229376.

The previous prime is 13021303219. The next prime is 13021303247. The reversal of 13021303221 is 12230312031.

13021303221 is a `hidden beast` number, since 130 + 213 + 0 + 322 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3982998321 + 9038304900 = 63111^2 + 95070^2 .

It is not a de Polignac number, because 13021303221 - 2¹ = 13021303219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13021303194 and 13021303203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021303291) 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 in 11 ways as a sum of consecutive naturals, for example, 42553126 + ... + 42553431.

It is an arithmetic number, because the mean of its divisors is an integer number (1659577881).

Almost surely, 2^13021303221 is an apocalyptic number.

It is an amenable number.

13021303221 is a deficient number, since it is larger than the sum of its proper divisors (6893631351).

13021303221 is a wasteful number, since it uses less digits than its factorization.

13021303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85106580 (or 85106577 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13021303221 its reverse (12230312031), we get a palindrome (25251615252).

The spelling of 13021303221 in words is "thirteen billion, twenty-one million, three hundred three thousand, two hundred twenty-one".