13021300320221 has 4 divisors (see below), whose sum is σ = 13021525205052. Its totient is φ = 13021075435392.

The previous prime is 13021300320199. The next prime is 13021300320241. The reversal of 13021300320221 is 12202300312031.

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 11690853417721 + 1330446902500 = 3419189^2 + 1153450^2 .

It is a cyclic number.

It is not a de Polignac number, because 13021300320221 - 2¹⁸ = 13021300058077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13021300320193 and 13021300320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021300320241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112355540 + ... + 112471373.

It is an arithmetic number, because the mean of its divisors is an integer number (3255381301263).

Almost surely, 2^{13021300320221} is an apocalyptic number.

It is an amenable number.

13021300320221 is a deficient number, since it is larger than the sum of its proper divisors (224884831).

13021300320221 is an equidigital number, since it uses as much as digits as its factorization.

13021300320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224884830.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13021300320221 its reverse (12202300312031), we get a palindrome (25223600632252).

The spelling of 13021300320221 in words is "thirteen trillion, twenty-one billion, three hundred million, three hundred twenty thousand, two hundred twenty-one".