202021020202 has 4 divisors (see below), whose sum is σ = 303031530306. Its totient is φ = 101010510100.

The previous prime is 202021020199. The next prime is 202021020211. The reversal of 202021020202 is 202020120202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 104502846361 + 97518173841 = 323269^2 + 312279^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505255049 + ... + 50505255052.

Almost surely, 2^202021020202 is an apocalyptic number.

202021020202 is a deficient number, since it is larger than the sum of its proper divisors (101010510104).

202021020202 is a wasteful number, since it uses less digits than its factorization.

202021020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101010510103.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 202021020202 its reverse (202020120202), we get a palindrome (404041140404).

The spelling of 202021020202 in words is "two hundred two billion, twenty-one million, twenty thousand, two hundred two".