13021102321 has 4 divisors (see below), whose sum is σ = 13045171444. Its totient is φ = 12997033200.

The previous prime is 13021102313. The next prime is 13021102331. The reversal of 13021102321 is 12320112031.

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 9203716096 + 3817386225 = 95936^2 + 61785^2 .

It is a cyclic number.

It is not a de Polignac number, because 13021102321 - 2³ = 13021102313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13021102295 and 13021102304.

It is not an unprimeable number, because it can be changed into a prime (13021102331) 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, 12033750 + ... + 12034831.

It is an arithmetic number, because the mean of its divisors is an integer number (3261292861).

Almost surely, 2^13021102321 is an apocalyptic number.

It is an amenable number.

13021102321 is a deficient number, since it is larger than the sum of its proper divisors (24069123).

13021102321 is an equidigital number, since it uses as much as digits as its factorization.

13021102321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24069122.

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

Adding to 13021102321 its reverse (12320112031), we get a palindrome (25341214352).

The spelling of 13021102321 in words is "thirteen billion, twenty-one million, one hundred two thousand, three hundred twenty-one".