42112123100 has 72 divisors (see below), whose sum is σ = 93898813008. Its totient is φ = 16384435200.

The previous prime is 42112123069. The next prime is 42112123153. The reversal of 42112123100 is 132121124.

It is a super-2 number, since 2×42112123100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1015982 + ... + 1056618.

Almost surely, 2^42112123100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42112123100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46949406504).

42112123100 is an abundant number, since it is smaller than the sum of its proper divisors (51786689908).

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

42112123100 is a wasteful number, since it uses less digits than its factorization.

42112123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40935 (or 40928 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 42112123100 its reverse (132121124), we get a palindrome (42244244224).

The spelling of 42112123100 in words is "forty-two billion, one hundred twelve million, one hundred twenty-three thousand, one hundred".