42010121 has 16 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 37818000.

The previous prime is 42010063. The next prime is 42010127. The reversal of 42010121 is 12101024.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42010121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42010127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109496 + ... + 109878.

It is an arithmetic number, because the mean of its divisors is an integer number (2903040).

Almost surely, 2^42010121 is an apocalyptic number.

It is an amenable number.

42010121 is a deficient number, since it is larger than the sum of its proper divisors (4438519).

42010121 is a wasteful number, since it uses less digits than its factorization.

42010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 42010121 is about 6481.5215034743. The cubic root of 42010121 is about 347.6305835681.

Adding to 42010121 its reverse (12101024), we get a palindrome (54111145).

The spelling of 42010121 in words is "forty-two million, ten thousand, one hundred twenty-one".