1001100005 has 4 divisors (see below), whose sum is σ = 1201320012. Its totient is φ = 800880000.

The previous prime is 1001099971. The next prime is 1001100007. The reversal of 1001100005 is 5000011001.

It is a happy number.

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 685078276 + 316021729 = 26174^2 + 17777^2 .

It is not a de Polignac number, because 1001100005 - 2¹⁸ = 1000837861 is a prime.

It is a super-2 number, since 2×1001100005² = 2004402440022000050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001099965 and 1001100001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001100007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100109996 + ... + 100110005.

It is an arithmetic number, because the mean of its divisors is an integer number (300330003).

Almost surely, 2^1001100005 is an apocalyptic number.

It is an amenable number.

1001100005 is a deficient number, since it is larger than the sum of its proper divisors (200220007).

1001100005 is an equidigital number, since it uses as much as digits as its factorization.

1001100005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200220006.

The product of its (nonzero) digits is 5, while the sum is 8.

The square root of 1001100005 is about 31640.1644275121. The cubic root of 1001100005 is about 1000.3665339698.

Adding to 1001100005 its reverse (5000011001), we get a palindrome (6001111006).

The spelling of 1001100005 in words is "one billion, one million, one hundred thousand, five".