244041221 has 2 divisors, whose sum is σ = 244041222. Its totient is φ = 244041220.

The previous prime is 244041209. The next prime is 244041223. The reversal of 244041221 is 122140442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228916900 + 15124321 = 15130^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 244041221 - 2⁶ = 244041157 is a prime.

It is a super-2 number, since 2×244041221² = 119112235094341682, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 244041223, it forms a pair of twin primes.

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 = 244041193 and 244041202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244041223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122020610 + 122020611.

It is an arithmetic number, because the mean of its divisors is an integer number (122020611).

Almost surely, 2^244041221 is an apocalyptic number.

It is an amenable number.

244041221 is a deficient number, since it is larger than the sum of its proper divisors (1).

244041221 is an equidigital number, since it uses as much as digits as its factorization.

244041221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 244041221 is about 15621.8187481484. The cubic root of 244041221 is about 624.9151637383.

Adding to 244041221 its reverse (122140442), we get a palindrome (366181663).

The spelling of 244041221 in words is "two hundred forty-four million, forty-one thousand, two hundred twenty-one".