13103313221 has 4 divisors (see below), whose sum is σ = 13104054444. Its totient is φ = 13102572000.

The previous prime is 13103313173. The next prime is 13103313257. The reversal of 13103313221 is 12231330131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6381772996 + 6721540225 = 79886^2 + 81985^2 .

It is a cyclic number.

It is not a de Polignac number, because 13103313221 - 2¹⁴ = 13103296837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13103313193 and 13103313202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13103313721) 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 3 ways as a sum of consecutive naturals, for example, 343430 + ... + 379671.

It is an arithmetic number, because the mean of its divisors is an integer number (3276013611).

Almost surely, 2^13103313221 is an apocalyptic number.

It is an amenable number.

13103313221 is a deficient number, since it is larger than the sum of its proper divisors (741223).

13103313221 is an equidigital number, since it uses as much as digits as its factorization.

13103313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741222.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13103313221 its reverse (12231330131), we get a palindrome (25334643352).

The spelling of 13103313221 in words is "thirteen billion, one hundred three million, three hundred thirteen thousand, two hundred twenty-one".