4068888221 has 2 divisors, whose sum is σ = 4068888222. Its totient is φ = 4068888220.

The previous prime is 4068888217. The next prime is 4068888253. The reversal of 4068888221 is 1228888604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3526696996 + 542191225 = 59386^2 + 23285^2 .

It is a cyclic number.

It is not a de Polignac number, because 4068888221 - 2² = 4068888217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4068888211) 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 as a sum of consecutive naturals, namely, 2034444110 + 2034444111.

It is an arithmetic number, because the mean of its divisors is an integer number (2034444111).

Almost surely, 2^4068888221 is an apocalyptic number.

It is an amenable number.

4068888221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4068888221 is an equidigital number, since it uses as much as digits as its factorization.

4068888221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393216, while the sum is 47.

The square root of 4068888221 is about 63787.8375632847. The cubic root of 4068888221 is about 1596.4620028192.

The spelling of 4068888221 in words is "four billion, sixty-eight million, eight hundred eighty-eight thousand, two hundred twenty-one".