21300321303 has 8 divisors (see below), whose sum is σ = 31556031600. Its totient is φ = 14200214184.

The previous prime is 21300321253. The next prime is 21300321323. The reversal of 21300321303 is 30312300312.

It is not a de Polignac number, because 21300321303 - 2⁹ = 21300320791 is a prime.

It is a super-2 number, since 2×21300321303² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300321323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394450368 + ... + 394450421.

It is an arithmetic number, because the mean of its divisors is an integer number (3944503950).

Almost surely, 2^21300321303 is an apocalyptic number.

21300321303 is a deficient number, since it is larger than the sum of its proper divisors (10255710297).

21300321303 is an equidigital number, since it uses as much as digits as its factorization.

21300321303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788900798 (or 788900792 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21300321303 its reverse (30312300312), we get a palindrome (51612621615).

The spelling of 21300321303 in words is "twenty-one billion, three hundred million, three hundred twenty-one thousand, three hundred three".