The numeral 2021 is the 21st year of the 21st century. The non-leap year began on a Friday and will end on a Friday.
The calendar of 2021 is the same as the year 2010, and will repeat in 2027, and in 2100, the last year of the 21st century. The numeral 2021 is a product of two consecutive prime numbers 43 and 47, says the teacher, with specialization in number theory, and who taught mathematics at reputed colleges in Bengaluru for 35 years.
The divisors of 2021 are only four 1, 43, 47 and 2021, adding up to 2112, a palindrome number (reads the same backwards as forwards.
Famous mathematician Pythagoras believed that the key to an explanation of the universe lay in number and said “everything is number, number rules the universe,” said Narayana who has also authored a book on prime numbers.
The veteran mathematics teacher said numbers have always fascinated him, and he has been working on mathematical properties of every new year for several years now.