42131102123123 has 12 divisors (see below), whose sum is σ = 45718942728888. Its totient is φ = 38806971278400.

The previous prime is 42131102123069. The next prime is 42131102123129. The reversal of 42131102123123 is 32132120113124.

It is not a de Polignac number, because 42131102123123 - 2³⁰ = 42130028381299 is a prime.

It is a super-2 number, since 2×42131102123123² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42131102123092 and 42131102123101.

It is not an unprimeable number, because it can be changed into a prime (42131102123129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 266833778 + ... + 266991623.

It is an arithmetic number, because the mean of its divisors is an integer number (3809911894074).

Almost surely, 2^{42131102123123} is an apocalyptic number.

42131102123123 is a deficient number, since it is larger than the sum of its proper divisors (3587840605765).

42131102123123 is a wasteful number, since it uses less digits than its factorization.

42131102123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533825894 (or 533825881 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 42131102123123 its reverse (32132120113124), we get a palindrome (74263222236247).

The spelling of 42131102123123 in words is "forty-two trillion, one hundred thirty-one billion, one hundred two million, one hundred twenty-three thousand, one hundred twenty-three".