4221384561671 has 2 divisors, whose sum is σ = 4221384561672. Its totient is φ = 4221384561670.

The previous prime is 4221384561631. The next prime is 4221384561697. The reversal of 4221384561671 is 1761654831224.

It is a happy number.

4221384561671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221384561671 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221384561631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110692280835 + 2110692280836.

It is an arithmetic number, because the mean of its divisors is an integer number (2110692280836).

Almost surely, 2^{4221384561671} is an apocalyptic number.

4221384561671 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221384561671 is an equidigital number, since it uses as much as digits as its factorization.

4221384561671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 50.

The spelling of 4221384561671 in words is "four trillion, two hundred twenty-one billion, three hundred eighty-four million, five hundred sixty-one thousand, six hundred seventy-one".