444201221 has 2 divisors, whose sum is σ = 444201222. Its totient is φ = 444201220.

The previous prime is 444201217. The next prime is 444201227. The reversal of 444201221 is 122102444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425968321 + 18232900 = 20639^2 + 4270^2 .

It is a cyclic number.

It is not a de Polignac number, because 444201221 - 2² = 444201217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 444201193 and 444201202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444201227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222100610 + 222100611.

It is an arithmetic number, because the mean of its divisors is an integer number (222100611).

Almost surely, 2^444201221 is an apocalyptic number.

It is an amenable number.

444201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

444201221 is an equidigital number, since it uses as much as digits as its factorization.

444201221 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 444201221 is about 21076.0817278734. The cubic root of 444201221 is about 763.0035922962.

Adding to 444201221 its reverse (122102444), we get a palindrome (566303665).

The spelling of 444201221 in words is "four hundred forty-four million, two hundred one thousand, two hundred twenty-one".