4020230221 has 4 divisors (see below), whose sum is σ = 4594548832. Its totient is φ = 3445911612.

The previous prime is 4020230219. The next prime is 4020230243. The reversal of 4020230221 is 1220320204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4020230221 - 2¹ = 4020230219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4020230195 and 4020230204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020230321) 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, 287159295 + ... + 287159308.

It is an arithmetic number, because the mean of its divisors is an integer number (1148637208).

Almost surely, 2^4020230221 is an apocalyptic number.

It is an amenable number.

4020230221 is a deficient number, since it is larger than the sum of its proper divisors (574318611).

4020230221 is an equidigital number, since it uses as much as digits as its factorization.

4020230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574318610.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4020230221 is about 63405.2854342601. The cubic root of 4020230221 is about 1590.0726758970.

Adding to 4020230221 its reverse (1220320204), we get a palindrome (5240550425).

The spelling of 4020230221 in words is "four billion, twenty million, two hundred thirty thousand, two hundred twenty-one".