2001232321 has 4 divisors (see below), whose sum is σ = 2183162544. Its totient is φ = 1819302100.

The previous prime is 2001232297. The next prime is 2001232327. The reversal of 2001232321 is 1232321002.

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 not a de Polignac number, because 2001232321 - 2⁷ = 2001232193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001232295 and 2001232304.

It is not an unprimeable number, because it can be changed into a prime (2001232327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90965095 + ... + 90965116.

It is an arithmetic number, because the mean of its divisors is an integer number (545790636).

Almost surely, 2^2001232321 is an apocalyptic number.

It is an amenable number.

2001232321 is a deficient number, since it is larger than the sum of its proper divisors (181930223).

2001232321 is a wasteful number, since it uses less digits than its factorization.

2001232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181930222.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2001232321 is about 44735.1351959508. The cubic root of 2001232321 is about 1260.1797679596.

Adding to 2001232321 its reverse (1232321002), we get a palindrome (3233553323).

The spelling of 2001232321 in words is "two billion, one million, two hundred thirty-two thousand, three hundred twenty-one".