221211200849 has 2 divisors, whose sum is σ = 221211200850. Its totient is φ = 221211200848.

The previous prime is 221211200827. The next prime is 221211200891. The reversal of 221211200849 is 948002112122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162898610449 + 58312590400 = 403607^2 + 241480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221211200849 is a prime.

It is not a weakly prime, because it can be changed into another prime (221211200449) 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, 110605600424 + 110605600425.

It is an arithmetic number, because the mean of its divisors is an integer number (110605600425).

Almost surely, 2^221211200849 is an apocalyptic number.

It is an amenable number.

221211200849 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211200849 is an equidigital number, since it uses as much as digits as its factorization.

221211200849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 221211200849 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred thousand, eight hundred forty-nine".