100128512 has 108 divisors (see below), whose sum is σ = 231384888. Its totient is φ = 42854400.

The previous prime is 100128491. The next prime is 100128529. The reversal of 100128512 is 215821001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2706158 + ... + 2706194.

Almost surely, 2^100128512 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 100128512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115692444).

100128512 is an abundant number, since it is smaller than the sum of its proper divisors (131256376).

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

100128512 is an equidigital number, since it uses as much as digits as its factorization.

100128512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 100128512 is about 10006.4235369087. The cubic root of 100128512 is about 464.3576315352.

Adding to 100128512 its reverse (215821001), we get a palindrome (315949513).

The spelling of 100128512 in words is "one hundred million, one hundred twenty-eight thousand, five hundred twelve".