210121202 has 4 divisors (see below), whose sum is σ = 315181806. Its totient is φ = 105060600.

The previous prime is 210121199. The next prime is 210121217. The reversal of 210121202 is 202121012.

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., 198499921 + 11621281 = 14089^2 + 3409^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52530299 + ... + 52530302.

Almost surely, 2^210121202 is an apocalyptic number.

210121202 is a deficient number, since it is larger than the sum of its proper divisors (105060604).

210121202 is a wasteful number, since it uses less digits than its factorization.

210121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105060603.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 210121202 is about 14495.5580092661. The cubic root of 210121202 is about 594.5065249075.

Adding to 210121202 its reverse (202121012), we get a palindrome (412242214).

The spelling of 210121202 in words is "two hundred ten million, one hundred twenty-one thousand, two hundred two".