2001023001 has 8 divisors (see below), whose sum is σ = 2964478560. Its totient is φ = 1334015316.

The previous prime is 2001022993. The next prime is 2001023027. The reversal of 2001023001 is 1003201002.

It is a happy number.

It is not a de Polignac number, because 2001023001 - 2³ = 2001022993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2001023071) 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, 37055955 + ... + 37056008.

It is an arithmetic number, because the mean of its divisors is an integer number (370559820).

Almost surely, 2^2001023001 is an apocalyptic number.

It is an amenable number.

2001023001 is a deficient number, since it is larger than the sum of its proper divisors (963455559).

2001023001 is an equidigital number, since it uses as much as digits as its factorization.

2001023001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74111972 (or 74111966 counting only the distinct ones).

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

The square root of 2001023001 is about 44732.7955866834. The cubic root of 2001023001 is about 1260.1358300280.

Adding to 2001023001 its reverse (1003201002), we get a palindrome (3004224003).

It can be divided in two parts, 200 and 1023001, that added together give a palindrome (1023201).

The spelling of 2001023001 in words is "two billion, one million, twenty-three thousand, one".