2001331001 has 8 divisors (see below), whose sum is σ = 2120738760. Its totient is φ = 1882110208.

The previous prime is 2001330997. The next prime is 2001331019. The reversal of 2001331001 is 1001331002.

It can be written as a sum of positive squares in 4 ways, for example, as 717972025 + 1283358976 = 26795^2 + 35824^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2001331001 - 2² = 2001330997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001331021) 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, 24386 + ... + 67803.

It is an arithmetic number, because the mean of its divisors is an integer number (265092345).

Almost surely, 2^2001331001 is an apocalyptic number.

It is an amenable number.

2001331001 is a deficient number, since it is larger than the sum of its proper divisors (119407759).

2001331001 is a wasteful number, since it uses less digits than its factorization.

2001331001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93483.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 2001331001 is about 44736.2381185544. The cubic root of 2001331001 is about 1260.2004806132.

Adding to 2001331001 its reverse (1001331002), we get a palindrome (3002662003).

Subtracting from 2001331001 its reverse (1001331002), we obtain a palindrome (999999999).

The spelling of 2001331001 in words is "two billion, one million, three hundred thirty-one thousand, one".