210001222020209 has 2 divisors, whose sum is σ = 210001222020210. Its totient is φ = 210001222020208.

The previous prime is 210001222020199. The next prime is 210001222020251. The reversal of 210001222020209 is 902020222100012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193246141690000 + 16755080330209 = 13901300^2 + 4093297^2 .

It is a cyclic number.

It is not a de Polignac number, because 210001222020209 - 2⁴ = 210001222020193 is a prime.

It is a super-2 number, since 2×210001222020209² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210001222022209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000611010104 + 105000611010105.

It is an arithmetic number, because the mean of its divisors is an integer number (105000611010105).

Almost surely, 2^{210001222020209} is an apocalyptic number.

It is an amenable number.

210001222020209 is a deficient number, since it is larger than the sum of its proper divisors (1).

210001222020209 is an equidigital number, since it uses as much as digits as its factorization.

210001222020209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 210001222020209 in words is "two hundred ten trillion, one billion, two hundred twenty-two million, twenty thousand, two hundred nine".