It is a happy number.
1020202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It is an Ulam number.
It is an unprimeable number.
21020202 is an apocalyptic number.
1020202 is an equidigital number, since it uses as much as digits as its factorization.
1020202 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 510103.
The square root of 1020202 is about 1010.0504937873. The cubic root of 1020202 is about 100.6689155431.
Adding to 1020202 its reverse (2020201), we get a palindrome (3040403).
Subtracting 1020202 from its reverse (2020201), we obtain a palindrome (999999).
The spelling of 1020202 in words is "one million, twenty thousand, two hundred two".