42016350121 has 2 divisors, whose sum is σ = 42016350122. Its totient is φ = 42016350120.

The previous prime is 42016350071. The next prime is 42016350143. The reversal of 42016350121 is 12105361024.

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., 41810025625 + 206324496 = 204475^2 + 14364^2 .

It is a cyclic number.

It is not a de Polignac number, because 42016350121 - 2⁷ = 42016349993 is a prime.

It is not a weakly prime, because it can be changed into another prime (42016350191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21008175060 + 21008175061.

It is an arithmetic number, because the mean of its divisors is an integer number (21008175061).

Almost surely, 2^42016350121 is an apocalyptic number.

It is an amenable number.

42016350121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42016350121 is an equidigital number, since it uses as much as digits as its factorization.

42016350121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 42016350121 in words is "forty-two billion, sixteen million, three hundred fifty thousand, one hundred twenty-one".