There has been "unprecedented interest" to attend the statesman's funeral week, South African Foreign Minister Maite Nkoana-Mashabane told a news conference here today.
The dignitaries who have confirmed attendance at upcoming memorial events include US President Barack Obama, Brazilian leader Dilma Rousseff, French President Francois Hollande and British Prime Minister David Cameron.
President Mukherjee will lead a five-member delegation to the memorial service of former South African President Mandela, who died on December 5 at the age of 95.
Some leaders are expected to travel to the anti-apartheid leader's rural childhood village Qunu for his funeral service and burial on December 15.
A number of dignitaries are also expected to attend memorial service, including UN Secretary General Ban Ki-moon, Kofi Annan, Martti Ahtisaari, Lakhdar Brahimi, Mary Robinson.
Palestinian leader Mahmud Abbas, Sri Lanka's President Mahinda Rajapaksa and Bangladesh's President Abdul Hamid will also attend the event. Britain's Prince Charles will be representing Queen Elizabeth II at the memorial service.