42021866071 has 2 divisors, whose sum is σ = 42021866072. Its totient is φ = 42021866070.

The previous prime is 42021866023. The next prime is 42021866101. The reversal of 42021866071 is 17066812024.

42021866071 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 is a cyclic number.

It is not a de Polignac number, because 42021866071 - 2¹⁷ = 42021734999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42021866071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42021866371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010933035 + 21010933036.

It is an arithmetic number, because the mean of its divisors is an integer number (21010933036).

Almost surely, 2^42021866071 is an apocalyptic number.

42021866071 is a deficient number, since it is larger than the sum of its proper divisors (1).

42021866071 is an equidigital number, since it uses as much as digits as its factorization.

42021866071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 42021866071 in words is "forty-two billion, twenty-one million, eight hundred sixty-six thousand, seventy-one".