2001220323 has 4 divisors (see below), whose sum is σ = 2668293768. Its totient is φ = 1334146880.

The previous prime is 2001220307. The next prime is 2001220349. The reversal of 2001220323 is 3230221002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001220323 - 2⁴ = 2001220307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001220303) 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, 333536718 + ... + 333536723.

It is an arithmetic number, because the mean of its divisors is an integer number (667073442).

Almost surely, 2^2001220323 is an apocalyptic number.

2001220323 is a deficient number, since it is larger than the sum of its proper divisors (667073445).

2001220323 is an equidigital number, since it uses as much as digits as its factorization.

2001220323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667073444.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 2001220323 is about 44735.0010953392. The cubic root of 2001220323 is about 1260.1772495668.

Adding to 2001220323 its reverse (3230221002), we get a palindrome (5231441325).

The spelling of 2001220323 in words is "two billion, one million, two hundred twenty thousand, three hundred twenty-three".