42116121 has 12 divisors (see below), whose sum is σ = 61315072. Its totient is φ = 27855576.

The previous prime is 42116119. The next prime is 42116153. The reversal of 42116121 is 12161124.

42116121 is a `hidden beast` number, since 42 + 11 + 612 + 1 = 666.

It is not a de Polignac number, because 42116121 - 2¹ = 42116119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42116094 and 42116103.

It is not an unprimeable number, because it can be changed into a prime (42116111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17281 + ... + 19566.

Almost surely, 2^42116121 is an apocalyptic number.

It is an amenable number.

42116121 is a deficient number, since it is larger than the sum of its proper divisors (19198951).

42116121 is a wasteful number, since it uses less digits than its factorization.

42116121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36980 (or 36977 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 42116121 is about 6489.6934442237. The cubic root of 42116121 is about 347.9227186696.

Adding to 42116121 its reverse (12161124), we get a palindrome (54277245).

The spelling of 42116121 in words is "forty-two million, one hundred sixteen thousand, one hundred twenty-one".