13221021013 has 8 divisors (see below), whose sum is σ = 13273965720. Its totient is φ = 13168104960.

The previous prime is 13221020999. The next prime is 13221021017. The reversal of 13221021013 is 31012012231.

It can be written as a sum of positive squares in 4 ways, for example, as 1561988484 + 11659032529 = 39522^2 + 107977^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13221021013 - 2¹³ = 13221012821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221021017) 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 7 ways as a sum of consecutive naturals, for example, 1750381 + ... + 1757917.

It is an arithmetic number, because the mean of its divisors is an integer number (1659245715).

Almost surely, 2^13221021013 is an apocalyptic number.

It is an amenable number.

13221021013 is a deficient number, since it is larger than the sum of its proper divisors (52944707).

13221021013 is an equidigital number, since it uses as much as digits as its factorization.

13221021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14327.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13221021013 its reverse (31012012231), we get a palindrome (44233033244).

The spelling of 13221021013 in words is "thirteen billion, two hundred twenty-one million, twenty-one thousand, thirteen".