21330020002321 has 4 divisors (see below), whose sum is σ = 21330073419444. Its totient is φ = 21329966585200.

The previous prime is 21330020002267. The next prime is 21330020002331. The reversal of 21330020002321 is 12320002003312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3117823621696 + 18212196380625 = 1765736^2 + 4267575^2 .

It is a cyclic number.

It is not a de Polignac number, because 21330020002321 - 2¹¹ = 21330020000273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330020002331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26105050 + ... + 26909731.

It is an arithmetic number, because the mean of its divisors is an integer number (5332518354861).

Almost surely, 2^{21330020002321} is an apocalyptic number.

It is an amenable number.

21330020002321 is a deficient number, since it is larger than the sum of its proper divisors (53417123).

21330020002321 is an equidigital number, since it uses as much as digits as its factorization.

21330020002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53417122.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21330020002321 its reverse (12320002003312), we get a palindrome (33650022005633).

The spelling of 21330020002321 in words is "twenty-one trillion, three hundred thirty billion, twenty million, two thousand, three hundred twenty-one".