2001330021 has 8 divisors (see below), whose sum is σ = 2808884320. Its totient is φ = 1263997872.

The previous prime is 2001330011. The next prime is 2001330031. The reversal of 2001330021 is 1200331002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2001330011) and next prime (2001330031).

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

It is not a de Polignac number, because 2001330021 - 2¹⁰ = 2001328997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2001329979 and 2001330006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001330011) 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, 17555470 + ... + 17555583.

It is an arithmetic number, because the mean of its divisors is an integer number (351110540).

Almost surely, 2^2001330021 is an apocalyptic number.

It is an amenable number.

2001330021 is a deficient number, since it is larger than the sum of its proper divisors (807554299).

2001330021 is a wasteful number, since it uses less digits than its factorization.

2001330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35111075.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2001330021 is about 44736.2271654640. The cubic root of 2001330021 is about 1260.2002749173.

Adding to 2001330021 its reverse (1200331002), we get a palindrome (3201661023).

The spelling of 2001330021 in words is "two billion, one million, three hundred thirty thousand, twenty-one".