2001404321 has 8 divisors (see below), whose sum is σ = 2313020160. Its totient is φ = 1696213728.

The previous prime is 2001404297. The next prime is 2001404329. The reversal of 2001404321 is 1234041002.

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 2001404321 - 2⁶ = 2001404257 is a prime.

It is a super-2 number, since 2×2001404321² = 8011238512234942082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001404321.

It is not an unprimeable number, because it can be changed into a prime (2001404329) 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, 1605641 + ... + 1606886.

It is an arithmetic number, because the mean of its divisors is an integer number (289127520).

Almost surely, 2^2001404321 is an apocalyptic number.

It is an amenable number.

2001404321 is a deficient number, since it is larger than the sum of its proper divisors (311615839).

2001404321 is an equidigital number, since it uses as much as digits as its factorization.

2001404321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212623.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2001404321 is about 44737.0575809362. The cubic root of 2001404321 is about 1260.2158698334.

Adding to 2001404321 its reverse (1234041002), we get a palindrome (3235445323).

The spelling of 2001404321 in words is "two billion, one million, four hundred four thousand, three hundred twenty-one".