21333322330321 has 2 divisors, whose sum is σ = 21333322330322. Its totient is φ = 21333322330320.

The previous prime is 21333322330279. The next prime is 21333322330373. The reversal of 21333322330321 is 12303322333312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21318868279696 + 14454050625 = 4617236^2 + 120225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21333322330321 is a prime.

It is a super-2 number, since 2×21333322330321² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21333322330921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666661165160 + 10666661165161.

It is an arithmetic number, because the mean of its divisors is an integer number (10666661165161).

Almost surely, 2^{21333322330321} is an apocalyptic number.

It is an amenable number.

21333322330321 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333322330321 is an equidigital number, since it uses as much as digits as its factorization.

21333322330321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 31.

Adding to 21333322330321 its reverse (12303322333312), we get a palindrome (33636644663633).

The spelling of 21333322330321 in words is "twenty-one trillion, three hundred thirty-three billion, three hundred twenty-two million, three hundred thirty thousand, three hundred twenty-one".