42106121181 has 6 divisors (see below), whose sum is σ = 60819952830. Its totient is φ = 28070747448.

The previous prime is 42106121173. The next prime is 42106121219. The reversal of 42106121181 is 18112160124.

It is a happy number.

42106121181 is a `hidden beast` number, since 42 + 1 + 0 + 612 + 1 + 1 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42079957956 + 26163225 = 205134^2 + 5115^2 .

It is not a de Polignac number, because 42106121181 - 2³ = 42106121173 is a prime.

It is a super-2 number, since 2×42106121181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42106121171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2339228946 + ... + 2339228963.

It is an arithmetic number, because the mean of its divisors is an integer number (10136658805).

Almost surely, 2^42106121181 is an apocalyptic number.

It is an amenable number.

42106121181 is a deficient number, since it is larger than the sum of its proper divisors (18713831649).

42106121181 is a wasteful number, since it uses less digits than its factorization.

42106121181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4678457915 (or 4678457912 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The spelling of 42106121181 in words is "forty-two billion, one hundred six million, one hundred twenty-one thousand, one hundred eighty-one".