100909090000 has 100 divisors (see below), whose sum is σ = 247058244180. Its totient is φ = 39909760000.

The previous prime is 100909089971. The next prime is 100909090049. The reversal of 100909090000 is 90909001.

100909090000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 66147724864 + 34761365136 = 257192^2 + 186444^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 833310 + ... + 946690.

Almost surely, 2^100909090000 is an apocalyptic number.

100909090000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100909090000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123529122090).

100909090000 is an abundant number, since it is smaller than the sum of its proper divisors (146149154180).

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

100909090000 is an equidigital number, since it uses as much as digits as its factorization.

100909090000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113498 (or 113477 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 28.

Adding to 100909090000 its reverse (90909001), we get a palindrome (100999999001).

The spelling of 100909090000 in words is "one hundred billion, nine hundred nine million, ninety thousand".