4421220243281 has 2 divisors, whose sum is σ = 4421220243282. Its totient is φ = 4421220243280.

The previous prime is 4421220243247. The next prime is 4421220243299. The reversal of 4421220243281 is 1823420221244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4017539184400 + 403681058881 = 2004380^2 + 635359^2 .

It is a cyclic number.

It is not a de Polignac number, because 4421220243281 - 2⁶ = 4421220243217 is a prime.

It is a super-2 number, since 2×4421220243281² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4421220543281) 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, 2210610121640 + 2210610121641.

It is an arithmetic number, because the mean of its divisors is an integer number (2210610121641).

Almost surely, 2^{4421220243281} is an apocalyptic number.

It is an amenable number.

4421220243281 is a deficient number, since it is larger than the sum of its proper divisors (1).

4421220243281 is an equidigital number, since it uses as much as digits as its factorization.

4421220243281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 35.

The spelling of 4421220243281 in words is "four trillion, four hundred twenty-one billion, two hundred twenty million, two hundred forty-three thousand, two hundred eighty-one".