41043516821 has 2 divisors, whose sum is σ = 41043516822. Its totient is φ = 41043516820.

The previous prime is 41043516797. The next prime is 41043516827. The reversal of 41043516821 is 12861534014.

41043516821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35143126225 + 5900390596 = 187465^2 + 76814^2 .

It is a cyclic number.

It is not a de Polignac number, because 41043516821 - 2¹⁰ = 41043515797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41043516827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20521758410 + 20521758411.

It is an arithmetic number, because the mean of its divisors is an integer number (20521758411).

Almost surely, 2^41043516821 is an apocalyptic number.

It is an amenable number.

41043516821 is a deficient number, since it is larger than the sum of its proper divisors (1).

41043516821 is an equidigital number, since it uses as much as digits as its factorization.

41043516821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 41043516821 in words is "forty-one billion, forty-three million, five hundred sixteen thousand, eight hundred twenty-one".