21020300003321 has 16 divisors (see below), whose sum is σ = 21856556160000. Its totient is φ = 20191630675776.

The previous prime is 21020300003293. The next prime is 21020300003357. The reversal of 21020300003321 is 12330000302012.

It is a cyclic number.

It is not a de Polignac number, because 21020300003321 - 2⁶ = 21020300003257 is a prime.

It is a super-2 number, since 2×21020300003321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21020300003321.

It is not an unprimeable number, because it can be changed into a prime (21020300003821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5990720 + ... + 8827758.

It is an arithmetic number, because the mean of its divisors is an integer number (1366034760000).

Almost surely, 2^{21020300003321} is an apocalyptic number.

It is an amenable number.

21020300003321 is a deficient number, since it is larger than the sum of its proper divisors (836256156679).

21020300003321 is a wasteful number, since it uses less digits than its factorization.

21020300003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838376.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21020300003321 its reverse (12330000302012), we get a palindrome (33350300305333).

The spelling of 21020300003321 in words is "twenty-one trillion, twenty billion, three hundred million, three thousand, three hundred twenty-one".