Get citizenship by investment is something that investor might interest with. Some countries are giving such incentive to attract investment, yet what about Indonesia. Can you get Indonesian citizenship if you are one of investors in the country.
Short answer is no. You can not get Indonesian citizenship by investment.
If you are an investor, what you can get is stay permit. The permit to stay will ease your needs to manage business in Indonesia.
Read more about how to get Indonesian Citizenship and how to regain Indonesian Citizenship.