42117311020 has 24 divisors (see below), whose sum is σ = 93101425200. Its totient is φ = 15960244032.

The previous prime is 42117311009. The next prime is 42117311023. The reversal of 42117311020 is 2011371124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42117310982 and 42117311000.

It is not an unprimeable number, because it can be changed into a prime (42117311023) 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 7 ways as a sum of consecutive naturals, for example, 55417135 + ... + 55417894.

It is an arithmetic number, because the mean of its divisors is an integer number (3879226050).

Almost surely, 2^42117311020 is an apocalyptic number.

It is an amenable number.

42117311020 is an abundant number, since it is smaller than the sum of its proper divisors (50984114180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42117311020 is a wasteful number, since it uses less digits than its factorization.

42117311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110835057 (or 110835055 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 42117311020 its reverse (2011371124), we get a palindrome (44128682144).

The spelling of 42117311020 in words is "forty-two billion, one hundred seventeen million, three hundred eleven thousand, twenty".