21210322200017 has 2 divisors, whose sum is σ = 21210322200018. Its totient is φ = 21210322200016.

The previous prime is 21210322200013. The next prime is 21210322200037. The reversal of 21210322200017 is 71000222301212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19983081419536 + 1227240780481 = 4470244^2 + 1107809^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210322200017 - 2² = 21210322200013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21210322199965 and 21210322200001.

It is not a weakly prime, because it can be changed into another prime (21210322200013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605161100008 + 10605161100009.

It is an arithmetic number, because the mean of its divisors is an integer number (10605161100009).

Almost surely, 2^{21210322200017} is an apocalyptic number.

It is an amenable number.

21210322200017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210322200017 is an equidigital number, since it uses as much as digits as its factorization.

21210322200017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 21210322200017 its reverse (71000222301212), we get a palindrome (92210544501229).

The spelling of 21210322200017 in words is "twenty-one trillion, two hundred ten billion, three hundred twenty-two million, two hundred thousand, seventeen".