989122032221 has 2 divisors, whose sum is σ = 989122032222. Its totient is φ = 989122032220.

The previous prime is 989122032203. The next prime is 989122032233. The reversal of 989122032221 is 122230221989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 888560743225 + 100561288996 = 942635^2 + 317114^2 .

It is a cyclic number.

It is not a de Polignac number, because 989122032221 - 2³⁸ = 714244125277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989122032121) 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, 494561016110 + 494561016111.

It is an arithmetic number, because the mean of its divisors is an integer number (494561016111).

Almost surely, 2^989122032221 is an apocalyptic number.

It is an amenable number.

989122032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

989122032221 is an equidigital number, since it uses as much as digits as its factorization.

989122032221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 989122032221 in words is "nine hundred eighty-nine billion, one hundred twenty-two million, thirty-two thousand, two hundred twenty-one".