444012221 has 2 divisors, whose sum is σ = 444012222. Its totient is φ = 444012220.

The previous prime is 444012199. The next prime is 444012241. The reversal of 444012221 is 122210444.

It is an a-pointer prime, because the next prime (444012241) can be obtained adding 444012221 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310147321 + 133864900 = 17611^2 + 11570^2 .

It is a cyclic number.

It is not a de Polignac number, because 444012221 - 2¹⁴ = 443995837 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 444012193 and 444012202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444012241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222006110 + 222006111.

It is an arithmetic number, because the mean of its divisors is an integer number (222006111).

Almost surely, 2^444012221 is an apocalyptic number.

It is an amenable number.

444012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

444012221 is an equidigital number, since it uses as much as digits as its factorization.

444012221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 444012221 is about 21071.5974952067. The cubic root of 444012221 is about 762.8953619645.

Adding to 444012221 its reverse (122210444), we get a palindrome (566222665).

It can be divided in two parts, 4440 and 12221, that added together give a palindrome (16661).

The spelling of 444012221 in words is "four hundred forty-four million, twelve thousand, two hundred twenty-one".