4021042321 has 8 divisors (see below), whose sum is σ = 4197473280. Its totient is φ = 3844744992.

The previous prime is 4021042313. The next prime is 4021042379. The reversal of 4021042321 is 1232401204.

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 4021042321 - 2³ = 4021042313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021042301) 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, 30736 + ... + 94798.

It is an arithmetic number, because the mean of its divisors is an integer number (524684160).

Almost surely, 2^4021042321 is an apocalyptic number.

It is an amenable number.

4021042321 is a deficient number, since it is larger than the sum of its proper divisors (176430959).

4021042321 is a wasteful number, since it uses less digits than its factorization.

4021042321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66815.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 4021042321 is about 63411.6891511336. The cubic root of 4021042321 is about 1590.1797353612.

Adding to 4021042321 its reverse (1232401204), we get a palindrome (5253443525).

The spelling of 4021042321 in words is "four billion, twenty-one million, forty-two thousand, three hundred twenty-one".