2001111001 has 8 divisors (see below), whose sum is σ = 2032859520. Its totient is φ = 1969523088.

The previous prime is 2001110999. The next prime is 2001111017. The reversal of 2001111001 is 1001111002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001111001 - 2¹ = 2001110999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001111061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14911 + ... + 64996.

It is an arithmetic number, because the mean of its divisors is an integer number (254107440).

Almost surely, 2^2001111001 is an apocalyptic number.

It is an amenable number.

2001111001 is a deficient number, since it is larger than the sum of its proper divisors (31748519).

2001111001 is an equidigital number, since it uses as much as digits as its factorization.

2001111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80303.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 2001111001 is about 44733.7791942510. The cubic root of 2001111001 is about 1260.1543023007.

Adding to 2001111001 its reverse (1001111002), we get a palindrome (3002222003).

Subtracting from 2001111001 its reverse (1001111002), we obtain a palindrome (999999999).

The spelling of 2001111001 in words is "two billion, one million, one hundred eleven thousand, one".