122010209 has 2 divisors, whose sum is σ = 122010210. Its totient is φ = 122010208.

The previous prime is 122010199. The next prime is 122010211. The reversal of 122010209 is 902010221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87235600 + 34774609 = 9340^2 + 5897^2 .

It is a cyclic number.

It is not a de Polignac number, because 122010209 - 2²⁴ = 105232993 is a prime.

It is a super-2 number, since 2×122010209² = 29772982200447362, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 122010211, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (122010269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61005104 + 61005105.

It is an arithmetic number, because the mean of its divisors is an integer number (61005105).

Almost surely, 2^122010209 is an apocalyptic number.

It is an amenable number.

122010209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122010209 is an equidigital number, since it uses as much as digits as its factorization.

122010209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 122010209 is about 11045.8231472353. The cubic root of 122010209 is about 495.9814002412.

The spelling of 122010209 in words is "one hundred twenty-two million, ten thousand, two hundred nine".