2001023321 has 16 divisors (see below), whose sum is σ = 2260623168. Its totient is φ = 1755499200.

The previous prime is 2001023257. The next prime is 2001023341. The reversal of 2001023321 is 1233201002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2001023321 - 2⁶ = 2001023257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001023296 and 2001023305.

It is not an unprimeable number, because it can be changed into a prime (2001023341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7430 + ... + 63696.

It is an arithmetic number, because the mean of its divisors is an integer number (141288948).

Almost surely, 2^2001023321 is an apocalyptic number.

It is an amenable number.

2001023321 is a deficient number, since it is larger than the sum of its proper divisors (259599847).

2001023321 is a wasteful number, since it uses less digits than its factorization.

2001023321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56392.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2001023321 is about 44732.7991634774. The cubic root of 2001023321 is about 1260.1358972009.

Adding to 2001023321 its reverse (1233201002), we get a palindrome (3234224323).

The spelling of 2001023321 in words is "two billion, one million, twenty-three thousand, three hundred twenty-one".