4055021321 has 12 divisors (see below), whose sum is σ = 4400933328. Its totient is φ = 3734578224.

The previous prime is 4055021297. The next prime is 4055021323. The reversal of 4055021321 is 1231205504.

It is not a de Polignac number, because 4055021321 - 2²² = 4050827017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4055021323) 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 11 ways as a sum of consecutive naturals, for example, 47786 + ... + 101948.

It is an arithmetic number, because the mean of its divisors is an integer number (366744444).

Almost surely, 2^4055021321 is an apocalyptic number.

It is an amenable number.

4055021321 is a deficient number, since it is larger than the sum of its proper divisors (345912007).

4055021321 is a wasteful number, since it uses less digits than its factorization.

4055021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54632 (or 54619 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 4055021321 is about 63679.0493098005. The cubic root of 4055021321 is about 1594.6463409442.

Adding to 4055021321 its reverse (1231205504), we get a palindrome (5286226825).

The spelling of 4055021321 in words is "four billion, fifty-five million, twenty-one thousand, three hundred twenty-one".