210021000120017 has 2 divisors, whose sum is σ = 210021000120018. Its totient is φ = 210021000120016.

The previous prime is 210021000119951. The next prime is 210021000120089. The reversal of 210021000120017 is 710021000120012.

210021000120017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156147616777216 + 53873383342801 = 12495904^2 + 7339849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210021000120017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021000119977 and 210021000120004.

It is not a weakly prime, because it can be changed into another prime (210021000125017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010500060008 + 105010500060009.

It is an arithmetic number, because the mean of its divisors is an integer number (105010500060009).

Almost surely, 2^{210021000120017} is an apocalyptic number.

It is an amenable number.

210021000120017 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021000120017 is an equidigital number, since it uses as much as digits as its factorization.

210021000120017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 210021000120017 its reverse (710021000120012), we get a palindrome (920042000240029).

The spelling of 210021000120017 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty thousand, seventeen".