210002112202121 has 4 divisors (see below), whose sum is σ = 210022554353172. Its totient is φ = 209981670051072.

The previous prime is 210002112202079. The next prime is 210002112202147. The reversal of 210002112202121 is 121202211200012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35344451814400 + 174657660387721 = 5945120^2 + 13215811^2 .

It is a cyclic number.

It is not a de Polignac number, because 210002112202121 - 2³⁸ = 209727234295177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210002112202121.

It is not an unprimeable number, because it can be changed into a prime (210002112202721) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 10221060116 + ... + 10221080661.

It is an arithmetic number, because the mean of its divisors is an integer number (52505638588293).

Almost surely, 2^{210002112202121} is an apocalyptic number.

It is an amenable number.

210002112202121 is a deficient number, since it is larger than the sum of its proper divisors (20442151051).

210002112202121 is a wasteful number, since it uses less digits than its factorization.

210002112202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20442151050.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210002112202121 its reverse (121202211200012), we get a palindrome (331204323402133).

The spelling of 210002112202121 in words is "two hundred ten trillion, two billion, one hundred twelve million, two hundred two thousand, one hundred twenty-one".