210002002000121 has 2 divisors, whose sum is σ = 210002002000122. Its totient is φ = 210002002000120.

The previous prime is 210002002000097. The next prime is 210002002000127. The reversal of 210002002000121 is 121000200200012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180727020075625 + 29274981924496 = 13443475^2 + 5410636^2 .

It is a cyclic number.

It is not a de Polignac number, because 210002002000121 - 2⁶ = 210002002000057 is a prime.

It is not a weakly prime, because it can be changed into another prime (210002002000127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105001001000060 + 105001001000061.

It is an arithmetic number, because the mean of its divisors is an integer number (105001001000061).

Almost surely, 2^{210002002000121} is an apocalyptic number.

It is an amenable number.

210002002000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210002002000121 is an equidigital number, since it uses as much as digits as its factorization.

210002002000121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 210002002000121 its reverse (121000200200012), we get a palindrome (331002202200133).

The spelling of 210002002000121 in words is "two hundred ten trillion, two billion, two million, one hundred twenty-one", and thus it is an aban number.