4054220221 has 2 divisors, whose sum is σ = 4054220222. Its totient is φ = 4054220220.

The previous prime is 4054220167. The next prime is 4054220243. The reversal of 4054220221 is 1220224504.

It is an a-pointer prime, because the next prime (4054220243) can be obtained adding 4054220221 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2103231321 + 1950988900 = 45861^2 + 44170^2 .

It is a cyclic number.

It is not a de Polignac number, because 4054220221 - 2⁹ = 4054219709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4054220192 and 4054220201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4054220321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2027110110 + 2027110111.

It is an arithmetic number, because the mean of its divisors is an integer number (2027110111).

Almost surely, 2^4054220221 is an apocalyptic number.

It is an amenable number.

4054220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4054220221 is an equidigital number, since it uses as much as digits as its factorization.

4054220221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 4054220221 is about 63672.7588612273. The cubic root of 4054220221 is about 1594.5413225636.

Adding to 4054220221 its reverse (1220224504), we get a palindrome (5274444725).

The spelling of 4054220221 in words is "four billion, fifty-four million, two hundred twenty thousand, two hundred twenty-one".