42040166121 has 12 divisors (see below), whose sum is σ = 62683545600. Its totient is φ = 27122687640.

The previous prime is 42040166117. The next prime is 42040166177. The reversal of 42040166121 is 12166104024.

42040166121 is a `hidden beast` number, since 4 + 2 + 0 + 40 + 1 + 6 + 612 + 1 = 666.

It is not a de Polignac number, because 42040166121 - 2² = 42040166117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42040166621) 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 in 11 ways as a sum of consecutive naturals, for example, 75340521 + ... + 75341078.

It is an arithmetic number, because the mean of its divisors is an integer number (5223628800).

Almost surely, 2^42040166121 is an apocalyptic number.

It is an amenable number.

42040166121 is a deficient number, since it is larger than the sum of its proper divisors (20643379479).

42040166121 is a wasteful number, since it uses less digits than its factorization.

42040166121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150681636 (or 150681633 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 42040166121 in words is "forty-two billion, forty million, one hundred sixty-six thousand, one hundred twenty-one".