4131444221 has 2 divisors, whose sum is σ = 4131444222. Its totient is φ = 4131444220.

The previous prime is 4131444209. The next prime is 4131444223. The reversal of 4131444221 is 1224441314.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4110604996 + 20839225 = 64114^2 + 4565^2 .

It is a cyclic number.

It is not a de Polignac number, because 4131444221 - 2⁶ = 4131444157 is a prime.

Together with 4131444223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4131444223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2065722110 + 2065722111.

It is an arithmetic number, because the mean of its divisors is an integer number (2065722111).

Almost surely, 2^4131444221 is an apocalyptic number.

It is an amenable number.

4131444221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4131444221 is an equidigital number, since it uses as much as digits as its factorization.

4131444221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 26.

The square root of 4131444221 is about 64276.3115074286. The cubic root of 4131444221 is about 1604.6018844156.

Adding to 4131444221 its reverse (1224441314), we get a palindrome (5355885535).

The spelling of 4131444221 in words is "four billion, one hundred thirty-one million, four hundred forty-four thousand, two hundred twenty-one".