13001300020021 has 4 divisors (see below), whose sum is σ = 13084110848332. Its totient is φ = 12918489191712.

The previous prime is 13001300020019. The next prime is 13001300020067. The reversal of 13001300020021 is 12002000310031.

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 2326116075921 + 10675183944100 = 1525161^2 + 3267290^2 .

It is a cyclic number.

It is not a de Polignac number, because 13001300020021 - 2¹ = 13001300020019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13001300019983 and 13001300020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13001300720021) 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, 41405413920 + ... + 41405414233.

It is an arithmetic number, because the mean of its divisors is an integer number (3271027712083).

Almost surely, 2^{13001300020021} is an apocalyptic number.

It is an amenable number.

13001300020021 is a deficient number, since it is larger than the sum of its proper divisors (82810828311).

13001300020021 is an equidigital number, since it uses as much as digits as its factorization.

13001300020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82810828310.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 13001300020021 its reverse (12002000310031), we get a palindrome (25003300330052).

The spelling of 13001300020021 in words is "thirteen trillion, one billion, three hundred million, twenty thousand, twenty-one".