42129059851 has 2 divisors, whose sum is σ = 42129059852. Its totient is φ = 42129059850.

The previous prime is 42129059849. The next prime is 42129059899. The reversal of 42129059851 is 15895092124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42129059851 - 2¹ = 42129059849 is a prime.

Together with 42129059849, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42129059801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21064529925 + 21064529926.

It is an arithmetic number, because the mean of its divisors is an integer number (21064529926).

Almost surely, 2^42129059851 is an apocalyptic number.

42129059851 is a deficient number, since it is larger than the sum of its proper divisors (1).

42129059851 is an equidigital number, since it uses as much as digits as its factorization.

42129059851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 42129059851 in words is "forty-two billion, one hundred twenty-nine million, fifty-nine thousand, eight hundred fifty-one".