4244442121 has 2 divisors, whose sum is σ = 4244442122. Its totient is φ = 4244442120.

The previous prime is 4244442119. The next prime is 4244442133. The reversal of 4244442121 is 1212444424.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3918134025 + 326308096 = 62595^2 + 18064^2 .

It is a cyclic number.

It is not a de Polignac number, because 4244442121 - 2¹ = 4244442119 is a prime.

Together with 4244442119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4244442121.

It is not a weakly prime, because it can be changed into another prime (4244442101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2122221060 + 2122221061.

It is an arithmetic number, because the mean of its divisors is an integer number (2122221061).

Almost surely, 2^4244442121 is an apocalyptic number.

It is an amenable number.

4244442121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4244442121 is an equidigital number, since it uses as much as digits as its factorization.

4244442121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8192, while the sum is 28.

The square root of 4244442121 is about 65149.3831206405. The cubic root of 4244442121 is about 1619.0994996637.

Adding to 4244442121 its reverse (1212444424), we get a palindrome (5456886545).

The spelling of 4244442121 in words is "four billion, two hundred forty-four million, four hundred forty-two thousand, one hundred twenty-one".