221839116049 has 2 divisors, whose sum is σ = 221839116050. Its totient is φ = 221839116048.

The previous prime is 221839115999. The next prime is 221839116067. The reversal of 221839116049 is 940611938122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220129872400 + 1709243649 = 469180^2 + 41343^2 .

It is a cyclic number.

It is not a de Polignac number, because 221839116049 - 2¹¹ = 221839114001 is a prime.

It is not a weakly prime, because it can be changed into another prime (221831116049) 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, 110919558024 + 110919558025.

It is an arithmetic number, because the mean of its divisors is an integer number (110919558025).

Almost surely, 2^221839116049 is an apocalyptic number.

It is an amenable number.

221839116049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221839116049 is an equidigital number, since it uses as much as digits as its factorization.

221839116049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 221839116049 in words is "two hundred twenty-one billion, eight hundred thirty-nine million, one hundred sixteen thousand, forty-nine".