2281220221649 has 2 divisors, whose sum is σ = 2281220221650. Its totient is φ = 2281220221648.

The previous prime is 2281220221561. The next prime is 2281220221663. The reversal of 2281220221649 is 9461220221822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1955256873025 + 325963348624 = 1398305^2 + 570932^2 .

It is a cyclic number.

It is not a de Polignac number, because 2281220221649 - 2⁸ = 2281220221393 is a prime.

It is not a weakly prime, because it can be changed into another prime (2281220221699) 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, 1140610110824 + 1140610110825.

It is an arithmetic number, because the mean of its divisors is an integer number (1140610110825).

Almost surely, 2^{2281220221649} is an apocalyptic number.

It is an amenable number.

2281220221649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281220221649 is an equidigital number, since it uses as much as digits as its factorization.

2281220221649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 2281220221649 in words is "two trillion, two hundred eighty-one billion, two hundred twenty million, two hundred twenty-one thousand, six hundred forty-nine".