210001020202 has 4 divisors (see below), whose sum is σ = 315001530306. Its totient is φ = 105000510100.

The previous prime is 210001020193. The next prime is 210001020227. The reversal of 210001020202 is 202020100012.

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., 129067029081 + 80933991121 = 359259^2 + 284489^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52500255049 + ... + 52500255052.

Almost surely, 2^210001020202 is an apocalyptic number.

210001020202 is a deficient number, since it is larger than the sum of its proper divisors (105000510104).

210001020202 is a wasteful number, since it uses less digits than its factorization.

210001020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105000510103.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 210001020202 its reverse (202020100012), we get a palindrome (412021120214).

It can be divided in two parts, 2100010 and 20202, that added together give a palindrome (2120212).

The spelling of 210001020202 in words is "two hundred ten billion, one million, twenty thousand, two hundred two".