21020313331303 has 16 divisors (see below), whose sum is σ = 24695470800000. Its totient is φ = 17639225549280.

The previous prime is 21020313331289. The next prime is 21020313331349. The reversal of 21020313331303 is 30313331302012.

It is a cyclic number.

It is not a de Polignac number, because 21020313331303 - 2²⁹ = 21019776460391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020313331393) 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 15 ways as a sum of consecutive naturals, for example, 12717448 + ... + 14274946.

It is an arithmetic number, because the mean of its divisors is an integer number (1543466925000).

Almost surely, 2^{21020313331303} is an apocalyptic number.

21020313331303 is a deficient number, since it is larger than the sum of its proper divisors (3675157468697).

21020313331303 is a wasteful number, since it uses less digits than its factorization.

21020313331303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651902.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 21020313331303 its reverse (30313331302012), we get a palindrome (51333644633315).

The spelling of 21020313331303 in words is "twenty-one trillion, twenty billion, three hundred thirteen million, three hundred thirty-one thousand, three hundred three".