13013021311321 has 4 divisors (see below), whose sum is σ = 13034965698612. Its totient is φ = 12991076924032.

The previous prime is 13013021311313. The next prime is 13013021311343. The reversal of 13013021311321 is 12311312031031.

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 2653706160400 + 10359315150921 = 1629020^2 + 3218589^2 .

It is a cyclic number.

It is not a de Polignac number, because 13013021311321 - 2³ = 13013021311313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13013021311292 and 13013021311301.

It is not an unprimeable number, because it can be changed into a prime (13013021311391) 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, 10972192756 + ... + 10972193941.

It is an arithmetic number, because the mean of its divisors is an integer number (3258741424653).

Almost surely, 2^{13013021311321} is an apocalyptic number.

It is an amenable number.

13013021311321 is a deficient number, since it is larger than the sum of its proper divisors (21944387291).

13013021311321 is an equidigital number, since it uses as much as digits as its factorization.

13013021311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21944387290.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 13013021311321 its reverse (12311312031031), we get a palindrome (25324333342352).

The spelling of 13013021311321 in words is "thirteen trillion, thirteen billion, twenty-one million, three hundred eleven thousand, three hundred twenty-one".