210341002066621 has 2 divisors, whose sum is σ = 210341002066622. Its totient is φ = 210341002066620.

The previous prime is 210341002066619. The next prime is 210341002066651. The reversal of 210341002066621 is 126660200143012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147648890979396 + 62692111087225 = 12151086^2 + 7917835^2 .

It is a cyclic number.

It is not a de Polignac number, because 210341002066621 - 2¹ = 210341002066619 is a prime.

Together with 210341002066619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210341002066651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105170501033310 + 105170501033311.

It is an arithmetic number, because the mean of its divisors is an integer number (105170501033311).

Almost surely, 2^{210341002066621} is an apocalyptic number.

It is an amenable number.

210341002066621 is a deficient number, since it is larger than the sum of its proper divisors (1).

210341002066621 is an equidigital number, since it uses as much as digits as its factorization.

210341002066621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 210341002066621 in words is "two hundred ten trillion, three hundred forty-one billion, two million, sixty-six thousand, six hundred twenty-one".