South Africa's economical system is one of the most developed in the continent. ( in fact, the second after Namibia). The country had an amazing grow after 1994 and is trying to leave apartheid behind. Inflation was controlled, opportunities were equal, foreign capital was attracted.
As for trade partners, South Africa does businesses with Germany, China, Japan, the United States and Spain.
Over 45% of the electricity of Africa is generated in South Africa and an important sector is tourism. Cape Town is ranked as the first world destination.
However, unemployment rate is high ( more than 25%)
As far as literacy rate, in 2015, it was over 94%.