Which Southern African country's name translates to 'House of Stone', boasts the Great Zimbabwe ruins, and experienced hyperinflation in the early 21st century?

1. Its economy is heavily reliant on agriculture, particularly tobacco.
2. Robert Mugabe was its president for over three decades.
3. It shares a border with South Africa, Zambia, Mozambique, and Botswana.
4. The Zambezi River forms its northern border with Zambia.