21313320220013 has 4 divisors (see below), whose sum is σ = 21314005765248. Its totient is φ = 21312634674780.

The previous prime is 21313320220009. The next prime is 21313320220033. The reversal of 21313320220013 is 31002202331312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21313320220013 - 2² = 21313320220009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313320220033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342725981 + ... + 342788162.

It is an arithmetic number, because the mean of its divisors is an integer number (5328501441312).

Almost surely, 2^{21313320220013} is an apocalyptic number.

It is an amenable number.

21313320220013 is a deficient number, since it is larger than the sum of its proper divisors (685545235).

21313320220013 is an equidigital number, since it uses as much as digits as its factorization.

21313320220013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685545234.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21313320220013 its reverse (31002202331312), we get a palindrome (52315522551325).

The spelling of 21313320220013 in words is "twenty-one trillion, three hundred thirteen billion, three hundred twenty million, two hundred twenty thousand, thirteen".