4020321321 has 24 divisors (see below), whose sum is σ = 6277989120. Its totient is φ = 2470520736.

The previous prime is 4020321311. The next prime is 4020321329. The reversal of 4020321321 is 1231230204.

4020321321 is a `hidden beast` number, since 4 + 0 + 20 + 321 + 321 = 666.

It is not a de Polignac number, because 4020321321 - 2¹⁷ = 4020190249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4020321294 and 4020321303.

It is not an unprimeable number, because it can be changed into a prime (4020321329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311385 + ... + 324038.

It is an arithmetic number, because the mean of its divisors is an integer number (261582880).

Almost surely, 2^4020321321 is an apocalyptic number.

It is an amenable number.

4020321321 is a deficient number, since it is larger than the sum of its proper divisors (2257667799).

4020321321 is a wasteful number, since it uses less digits than its factorization.

4020321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635485 (or 635482 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 4020321321 is about 63406.0038245591. The cubic root of 4020321321 is about 1590.0846863639.

Adding to 4020321321 its reverse (1231230204), we get a palindrome (5251551525).

The spelling of 4020321321 in words is "four billion, twenty million, three hundred twenty-one thousand, three hundred twenty-one".