210021120202 has 4 divisors (see below), whose sum is σ = 315031680306. Its totient is φ = 105010560100.

The previous prime is 210021120187. The next prime is 210021120203. The reversal of 210021120202 is 202021120012.

It is a happy number.

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., 131739235681 + 78281884521 = 362959^2 + 279789^2 .

It is not an unprimeable number, because it can be changed into a prime (210021120203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52505280049 + ... + 52505280052.

Almost surely, 2^210021120202 is an apocalyptic number.

210021120202 is a deficient number, since it is larger than the sum of its proper divisors (105010560104).

210021120202 is a wasteful number, since it uses less digits than its factorization.

210021120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105010560103.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210021120202 its reverse (202021120012), we get a palindrome (412042240214).

The spelling of 210021120202 in words is "two hundred ten billion, twenty-one million, one hundred twenty thousand, two hundred two".