100001001000 has 64 divisors (see below), whose sum is σ = 312003132480. Its totient is φ = 26666932800.

The previous prime is 100001000999. The next prime is 100001001011. The reversal of 100001001000 is 100100001.

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16663834 + ... + 16669833.

It is an arithmetic number, because the mean of its divisors is an integer number (4875048945).

Almost surely, 2^100001001000 is an apocalyptic number.

100001001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100001001000 is an abundant number, since it is smaller than the sum of its proper divisors (212002131480).

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

100001001000 is a wasteful number, since it uses less digits than its factorization.

100001001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333691 (or 33333677 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 3.

Adding to 100001001000 its reverse (100100001), we get a palindrome (100101101001).

Subtracting from 100001001000 its reverse (100100001), we obtain a palindrome (99900900999).

The spelling of 100001001000 in words is "one hundred billion, one million, one thousand".