100000001005 has 4 divisors (see below), whose sum is σ = 120000001212. Its totient is φ = 80000000800.

The previous prime is 100000000951. The next prime is 100000001009. The reversal of 100000001005 is 500100000001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66359305609 + 33640695396 = 257603^2 + 183414^2 .

It is not a de Polignac number, because 100000001005 - 2¹¹ = 99999998957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000001009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10000000096 + ... + 10000000105.

It is an arithmetic number, because the mean of its divisors is an integer number (30000000303).

Almost surely, 2^100000001005 is an apocalyptic number.

It is an amenable number.

100000001005 is a deficient number, since it is larger than the sum of its proper divisors (20000000207).

100000001005 is an equidigital number, since it uses as much as digits as its factorization.

100000001005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20000000206.

The product of its (nonzero) digits is 5, while the sum is 7.

Adding to 100000001005 its reverse (500100000001), we get a palindrome (600100001006).

The spelling of 100000001005 in words is "one hundred billion, one thousand, five".