201210666641 has 2 divisors, whose sum is σ = 201210666642. Its totient is φ = 201210666640.

The previous prime is 201210666607. The next prime is 201210666649. The reversal of 201210666641 is 146666012102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190746195025 + 10464471616 = 436745^2 + 102296^2 .

It is a cyclic number.

It is not a de Polignac number, because 201210666641 - 2²⁶ = 201143557777 is a prime.

It is not a weakly prime, because it can be changed into another prime (201210666649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605333320 + 100605333321.

It is an arithmetic number, because the mean of its divisors is an integer number (100605333321).

Almost surely, 2^201210666641 is an apocalyptic number.

It is an amenable number.

201210666641 is a deficient number, since it is larger than the sum of its proper divisors (1).

201210666641 is an equidigital number, since it uses as much as digits as its factorization.

201210666641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

Adding to 201210666641 its reverse (146666012102), we get a palindrome (347876678743).

The spelling of 201210666641 in words is "two hundred one billion, two hundred ten million, six hundred sixty-six thousand, six hundred forty-one".