2001115001 has 4 divisors (see below), whose sum is σ = 2001935232. Its totient is φ = 2000294772.

The previous prime is 2001114989. The next prime is 2001115013. The reversal of 2001115001 is 1005111002.

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 an interprime number because it is at equal distance from previous prime (2001114989) and next prime (2001115013).

It is a cyclic number.

It is not a de Polignac number, because 2001115001 - 2⁶ = 2001114937 is a prime.

It is a super-2 number, since 2×2001115001² = 8008922494454460002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001115021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406445 + ... + 411338.

It is an arithmetic number, because the mean of its divisors is an integer number (500483808).

Almost surely, 2^2001115001 is an apocalyptic number.

It is an amenable number.

2001115001 is a deficient number, since it is larger than the sum of its proper divisors (820231).

2001115001 is an equidigital number, since it uses as much as digits as its factorization.

2001115001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820230.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 2001115001 is about 44733.8239031720. The cubic root of 2001115001 is about 1260.1551419365.

Adding to 2001115001 its reverse (1005111002), we get a palindrome (3006226003).

The spelling of 2001115001 in words is "two billion, one million, one hundred fifteen thousand, one".