4021444444249 has 2 divisors, whose sum is σ = 4021444444250. Its totient is φ = 4021444444248.

The previous prime is 4021444444247. The next prime is 4021444444343. The reversal of 4021444444249 is 9424444441204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3887995240000 + 133449204249 = 1971800^2 + 365307^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021444444249 - 2¹ = 4021444444247 is a prime.

It is a super-2 number, since 2×4021444444249² (a number of 26 digits) contains 22 as substring.

Together with 4021444444247, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4021444444199 and 4021444444208.

It is not a weakly prime, because it can be changed into another prime (4021444444247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722222124 + 2010722222125.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722222125).

Almost surely, 2^{4021444444249} is an apocalyptic number.

It is an amenable number.

4021444444249 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444444249 is an equidigital number, since it uses as much as digits as its factorization.

4021444444249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2359296, while the sum is 46.

The spelling of 4021444444249 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred forty-four thousand, two hundred forty-nine".