4021441841861 has 2 divisors, whose sum is σ = 4021441841862. Its totient is φ = 4021441841860.

The previous prime is 4021441841821. The next prime is 4021441841863. The reversal of 4021441841861 is 1681481441204.

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., 2128943628100 + 1892498213761 = 1459090^2 + 1375681^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021441841861 - 2⁶ = 4021441841797 is a prime.

Together with 4021441841863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021441841863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010720920930 + 2010720920931.

It is an arithmetic number, because the mean of its divisors is an integer number (2010720920931).

Almost surely, 2^{4021441841861} is an apocalyptic number.

It is an amenable number.

4021441841861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021441841861 is an equidigital number, since it uses as much as digits as its factorization.

4021441841861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196608, while the sum is 44.

The spelling of 4021441841861 in words is "four trillion, twenty-one billion, four hundred forty-one million, eight hundred forty-one thousand, eight hundred sixty-one".