122112209 has 2 divisors, whose sum is σ = 122112210. Its totient is φ = 122112208.

The previous prime is 122112197. The next prime is 122112229. The reversal of 122112209 is 902211221.

It is a happy number.

It is an a-pointer prime, because the next prime (122112229) can be obtained adding 122112209 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116035984 + 6076225 = 10772^2 + 2465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122112209 is a prime.

It is a super-2 number, since 2×122112209² = 29822783173719362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122112229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61056104 + 61056105.

It is an arithmetic number, because the mean of its divisors is an integer number (61056105).

Almost surely, 2^122112209 is an apocalyptic number.

It is an amenable number.

122112209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122112209 is an equidigital number, since it uses as much as digits as its factorization.

122112209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 122112209 is about 11050.4393125341. The cubic root of 122112209 is about 496.1195745030.

The spelling of 122112209 in words is "one hundred twenty-two million, one hundred twelve thousand, two hundred nine".