21000330203321 has 32 divisors (see below), whose sum is σ = 25364306165760. Its totient is φ = 16997422425984.

The previous prime is 21000330203299. The next prime is 21000330203339. The reversal of 21000330203321 is 12330203300012.

It is not a de Polignac number, because 21000330203321 - 2¹⁴ = 21000330186937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000330203293 and 21000330203302.

It is not an unprimeable number, because it can be changed into a prime (21000330203351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97485296 + ... + 97700478.

It is an arithmetic number, because the mean of its divisors is an integer number (792634567680).

Almost surely, 2^{21000330203321} is an apocalyptic number.

It is an amenable number.

21000330203321 is a deficient number, since it is larger than the sum of its proper divisors (4363975962439).

21000330203321 is a wasteful number, since it uses less digits than its factorization.

21000330203321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222965.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21000330203321 its reverse (12330203300012), we get a palindrome (33330533503333).

The spelling of 21000330203321 in words is "twenty-one trillion, three hundred thirty million, two hundred three thousand, three hundred twenty-one".