210221200122202 has 4 divisors (see below), whose sum is σ = 315331800183306. Its totient is φ = 105110600061100.

The previous prime is 210221200122187. The next prime is 210221200122229. The reversal of 210221200122202 is 202221002122012.

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., 202464412542001 + 7756787580201 = 14228999^2 + 2785101^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 210221200122202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52555300030549 + ... + 52555300030552.

Almost surely, 2^{210221200122202} is an apocalyptic number.

210221200122202 is a deficient number, since it is larger than the sum of its proper divisors (105110600061104).

210221200122202 is a wasteful number, since it uses less digits than its factorization.

210221200122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105110600061103.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 210221200122202 its reverse (202221002122012), we get a palindrome (412442202244214).

The spelling of 210221200122202 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred million, one hundred twenty-two thousand, two hundred two".