10001009001 has 4 divisors (see below), whose sum is σ = 13334678672. Its totient is φ = 6667339332.

The previous prime is 10001008973. The next prime is 10001009003. The reversal of 10001009001 is 10090010001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10001009001 - 2¹⁰ = 10001007977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10001009003) 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, 1666834831 + ... + 1666834836.

It is an arithmetic number, because the mean of its divisors is an integer number (3333669668).

Almost surely, 2^10001009001 is an apocalyptic number.

It is an amenable number.

10001009001 is a deficient number, since it is larger than the sum of its proper divisors (3333669671).

10001009001 is an equidigital number, since it uses as much as digits as its factorization.

10001009001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333669670.

The product of its (nonzero) digits is 9, while the sum is 12.

Adding to 10001009001 its reverse (10090010001), we get a palindrome (20091019002).

The spelling of 10001009001 in words is "ten billion, one million, nine thousand, one".