122222222209 has 4 divisors (see below), whose sum is σ = 122225212116. Its totient is φ = 122219232304.

The previous prime is 122222222197. The next prime is 122222222237. The reversal of 122222222209 is 902222222221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59852154609 + 62370067600 = 244647^2 + 249740^2 .

It is a cyclic number.

It is not a de Polignac number, because 122222222209 - 2¹¹ = 122222220161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122222222299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1432774 + ... + 1515679.

It is an arithmetic number, because the mean of its divisors is an integer number (30556303029).

Almost surely, 2^122222222209 is an apocalyptic number.

It is an amenable number.

122222222209 is a deficient number, since it is larger than the sum of its proper divisors (2989907).

122222222209 is an equidigital number, since it uses as much as digits as its factorization.

122222222209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989906.

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 122222222209 in words is "one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred nine".