Last week the country's central bank began circulating Z$10, Z$20 and Z$50 billion notes - but they are no longer sufficient. A political deadlock between President Robert Mugabe and opposition leader Morgan Tsvangirai over power-sharing has done little to help Zimbabwe's failing economy.
The country is also in the grip of a cholera epidemic with food and petrol prices doubling every day.Zimbabweans often have to line up for hours outside banks to withdraw barely enough cash to buy a loaf of bread.
An official estimate put inflation at 231,000,000% in July - but some experts now believe it is much higher.In addition to the Z$100 trillion note, the Reserve Bank of Zimbabwe plans to launch Z$10 trillion, Z$20 trillion and Z$50 trillion notes, the Herald newspaper reported.
A local collects food aid But new bank notes issued in the past have done little to help the spiralling cost of living. Many blame the dire state of the economy on mismanagement by Mr Mugabe's government.