21002022010217 has 2 divisors, whose sum is σ = 21002022010218. Its totient is φ = 21002022010216.

The previous prime is 21002022010141. The next prime is 21002022010267. The reversal of 21002022010217 is 71201022020012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11376987334441 + 9625034675776 = 3372979^2 + 3102424^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002022010217 - 2¹⁰ = 21002022009193 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002022010267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501011005108 + 10501011005109.

It is an arithmetic number, because the mean of its divisors is an integer number (10501011005109).

Almost surely, 2^{21002022010217} is an apocalyptic number.

It is an amenable number.

21002022010217 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002022010217 is an equidigital number, since it uses as much as digits as its factorization.

21002022010217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 21002022010217 its reverse (71201022020012), we get a palindrome (92203044030229).

The spelling of 21002022010217 in words is "twenty-one trillion, two billion, twenty-two million, ten thousand, two hundred seventeen".