4042332221 has 2 divisors, whose sum is σ = 4042332222. Its totient is φ = 4042332220.

The previous prime is 4042332211. The next prime is 4042332257. The reversal of 4042332221 is 1222332404.

4042332221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2663695321 + 1378636900 = 51611^2 + 37130^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042332221 - 2¹⁰ = 4042331197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4042332211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021166110 + 2021166111.

It is an arithmetic number, because the mean of its divisors is an integer number (2021166111).

Almost surely, 2^4042332221 is an apocalyptic number.

It is an amenable number.

4042332221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042332221 is an equidigital number, since it uses as much as digits as its factorization.

4042332221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 4042332221 is about 63579.3380037886. The cubic root of 4042332221 is about 1592.9812638026.

Adding to 4042332221 its reverse (1222332404), we get a palindrome (5264664625).

The spelling of 4042332221 in words is "four billion, forty-two million, three hundred thirty-two thousand, two hundred twenty-one".