13021020002321 has 4 divisors (see below), whose sum is σ = 13021049416500. Its totient is φ = 13020990588144.

The previous prime is 13021020002303. The next prime is 13021020002357. The reversal of 13021020002321 is 12320002012031.

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 5595046198225 + 7425973804096 = 2365385^2 + 2725064^2 .

It is a cyclic number.

It is not a de Polignac number, because 13021020002321 - 2⁴² = 8622973491217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13021020002321.

It is not an unprimeable number, because it can be changed into a prime (13021020005321) 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, 14032766 + ... + 14931863.

It is an arithmetic number, because the mean of its divisors is an integer number (3255262354125).

Almost surely, 2^{13021020002321} is an apocalyptic number.

It is an amenable number.

13021020002321 is a deficient number, since it is larger than the sum of its proper divisors (29414179).

13021020002321 is an equidigital number, since it uses as much as digits as its factorization.

13021020002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29414178.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13021020002321 its reverse (12320002012031), we get a palindrome (25341022014352).

The spelling of 13021020002321 in words is "thirteen trillion, twenty-one billion, twenty million, two thousand, three hundred twenty-one".