221200021241 has 2 divisors, whose sum is σ = 221200021242. Its totient is φ = 221200021240.

The previous prime is 221200021223. The next prime is 221200021283. The reversal of 221200021241 is 142120002122.

221200021241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133678715641 + 87521305600 = 365621^2 + 295840^2 .

It is a cyclic number.

It is not a de Polignac number, because 221200021241 - 2¹⁸ = 221199759097 is a prime.

It is not a weakly prime, because it can be changed into another prime (221200021841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600010620 + 110600010621.

It is an arithmetic number, because the mean of its divisors is an integer number (110600010621).

Almost surely, 2^221200021241 is an apocalyptic number.

It is an amenable number.

221200021241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200021241 is an equidigital number, since it uses as much as digits as its factorization.

221200021241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221200021241 its reverse (142120002122), we get a palindrome (363320023363).

The spelling of 221200021241 in words is "two hundred twenty-one billion, two hundred million, twenty-one thousand, two hundred forty-one".