21002120321333 has 2 divisors, whose sum is σ = 21002120321334. Its totient is φ = 21002120321332.

The previous prime is 21002120321317. The next prime is 21002120321363. The reversal of 21002120321333 is 33312302120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10577442280804 + 10424678040529 = 3252298^2 + 3228727^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002120321333 - 2⁴ = 21002120321317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002120321299 and 21002120321308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002120321363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501060160666 + 10501060160667.

It is an arithmetic number, because the mean of its divisors is an integer number (10501060160667).

Almost surely, 2^{21002120321333} is an apocalyptic number.

It is an amenable number.

21002120321333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002120321333 is an equidigital number, since it uses as much as digits as its factorization.

21002120321333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21002120321333 its reverse (33312302120012), we get a palindrome (54314422441345).

The spelling of 21002120321333 in words is "twenty-one trillion, two billion, one hundred twenty million, three hundred twenty-one thousand, three hundred thirty-three".