221210210489 has 2 divisors, whose sum is σ = 221210210490. Its totient is φ = 221210210488.

The previous prime is 221210210477. The next prime is 221210210503. The reversal of 221210210489 is 984012012122.

221210210489 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., 156040800400 + 65169410089 = 395020^2 + 255283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221210210489 is a prime.

It is not a weakly prime, because it can be changed into another prime (221210210449) 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, 110605105244 + 110605105245.

It is an arithmetic number, because the mean of its divisors is an integer number (110605105245).

Almost surely, 2^221210210489 is an apocalyptic number.

It is an amenable number.

221210210489 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210210489 is an equidigital number, since it uses as much as digits as its factorization.

221210210489 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 221210210489 in words is "two hundred twenty-one billion, two hundred ten million, two hundred ten thousand, four hundred eighty-nine".