The general unit structure of bitcoins has 1 bitcoin (BTC) equivalent to 1,000 millibitcoins (mBTC), 1,000,000 microbitcoins (μBTC), or 100,000,000 satoshis. While the exact figure is unknown, it is estimated that Satoshi Nakamoto may possess 1 million bitcoins, equivalent to 100,000,000,000,000 satoshis.