21313200311305 has 16 divisors (see below), whose sum is σ = 29252068179840. Its totient is φ = 14603497765632.

The previous prime is 21313200311203. The next prime is 21313200311317. The reversal of 21313200311305 is 50311300231312.

It is a cyclic number.

It is not a de Polignac number, because 21313200311305 - 2¹⁹ = 21313199787017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21313200311305.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 234707335 + ... + 234798124.

It is an arithmetic number, because the mean of its divisors is an integer number (1828254261240).

Almost surely, 2^{21313200311305} is an apocalyptic number.

It is an amenable number.

21313200311305 is a deficient number, since it is larger than the sum of its proper divisors (7938867868535).

21313200311305 is a wasteful number, since it uses less digits than its factorization.

21313200311305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469506768.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 21313200311305 its reverse (50311300231312), we get a palindrome (71624500542617).

The spelling of 21313200311305 in words is "twenty-one trillion, three hundred thirteen billion, two hundred million, three hundred eleven thousand, three hundred five".