221325472241 has 2 divisors, whose sum is σ = 221325472242. Its totient is φ = 221325472240.

The previous prime is 221325472223. The next prime is 221325472307. The reversal of 221325472241 is 142274523122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186692262241 + 34633210000 = 432079^2 + 186100^2 .

It is a cyclic number.

It is not a de Polignac number, because 221325472241 - 2²⁶ = 221258363377 is a prime.

It is not a weakly prime, because it can be changed into another prime (221325474241) 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, 110662736120 + 110662736121.

It is an arithmetic number, because the mean of its divisors is an integer number (110662736121).

Almost surely, 2^221325472241 is an apocalyptic number.

It is an amenable number.

221325472241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221325472241 is an equidigital number, since it uses as much as digits as its factorization.

221325472241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 35.

Adding to 221325472241 its reverse (142274523122), we get a palindrome (363599995363).

The spelling of 221325472241 in words is "two hundred twenty-one billion, three hundred twenty-five million, four hundred seventy-two thousand, two hundred forty-one".