42123432123 has 6 divisors (see below), whose sum is σ = 60844957524. Its totient is φ = 28082288076.

The previous prime is 42123432101. The next prime is 42123432137. The reversal of 42123432123 is 32123432124.

42123432123 is a `hidden beast` number, since 4 + 212 + 3 + 432 + 12 + 3 = 666.

It is not a de Polignac number, because 42123432123 - 2³³ = 33533497531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42123432523) 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 5 ways as a sum of consecutive naturals, for example, 2340190665 + ... + 2340190682.

It is an arithmetic number, because the mean of its divisors is an integer number (10140826254).

Almost surely, 2^42123432123 is an apocalyptic number.

42123432123 is a deficient number, since it is larger than the sum of its proper divisors (18721525401).

42123432123 is a wasteful number, since it uses less digits than its factorization.

42123432123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680381353 (or 4680381350 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 42123432123 its reverse (32123432124), we get a palindrome (74246864247).

Subtracting from 42123432123 its reverse (32123432124), we obtain a palindrome (9999999999).

The spelling of 42123432123 in words is "forty-two billion, one hundred twenty-three million, four hundred thirty-two thousand, one hundred twenty-three".