122105043209 has 2 divisors, whose sum is σ = 122105043210. Its totient is φ = 122105043208.

The previous prime is 122105043197. The next prime is 122105043223. The reversal of 122105043209 is 902340501221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81412067584 + 40692975625 = 285328^2 + 201725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122105043209 is a prime.

It is not a weakly prime, because it can be changed into another prime (122105043239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61052521604 + 61052521605.

It is an arithmetic number, because the mean of its divisors is an integer number (61052521605).

Almost surely, 2^122105043209 is an apocalyptic number.

It is an amenable number.

122105043209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122105043209 is an equidigital number, since it uses as much as digits as its factorization.

122105043209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 122105043209 in words is "one hundred twenty-two billion, one hundred five million, forty-three thousand, two hundred nine".