42003122171 has 2 divisors, whose sum is σ = 42003122172. Its totient is φ = 42003122170.

The previous prime is 42003122107. The next prime is 42003122173. The reversal of 42003122171 is 17122130024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42003122171 - 2⁶ = 42003122107 is a prime.

It is a super-2 number, since 2×42003122171² (a number of 22 digits) contains 22 as substring.

Together with 42003122173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42003122173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21001561085 + 21001561086.

It is an arithmetic number, because the mean of its divisors is an integer number (21001561086).

Almost surely, 2^42003122171 is an apocalyptic number.

42003122171 is a deficient number, since it is larger than the sum of its proper divisors (1).

42003122171 is an equidigital number, since it uses as much as digits as its factorization.

42003122171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 42003122171 its reverse (17122130024), we get a palindrome (59125252195).

The spelling of 42003122171 in words is "forty-two billion, three million, one hundred twenty-two thousand, one hundred seventy-one".