210200202001021 has 2 divisors, whose sum is σ = 210200202001022. Its totient is φ = 210200202001020.

The previous prime is 210200202001019. The next prime is 210200202001117. The reversal of 210200202001021 is 120100202002012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111741516657796 + 98458685343225 = 10570786^2 + 9922635^2 .

It is a cyclic number.

It is not a de Polignac number, because 210200202001021 - 2¹ = 210200202001019 is a prime.

Together with 210200202001019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 210200202000992 and 210200202001010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210200202001921) 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 as a sum of consecutive naturals, namely, 105100101000510 + 105100101000511.

It is an arithmetic number, because the mean of its divisors is an integer number (105100101000511).

Almost surely, 2^{210200202001021} is an apocalyptic number.

It is an amenable number.

210200202001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210200202001021 is an equidigital number, since it uses as much as digits as its factorization.

210200202001021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 210200202001021 its reverse (120100202002012), we get a palindrome (330300404003033).

Subtracting from 210200202001021 its reverse (120100202002012), we obtain a palindrome (90099999999009).

The spelling of 210200202001021 in words is "two hundred ten trillion, two hundred billion, two hundred two million, one thousand, twenty-one".