89120221 has 2 divisors, whose sum is σ = 89120222. Its totient is φ = 89120220.

The previous prime is 89120197. The next prime is 89120261. The reversal of 89120221 is 12202198.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81252196 + 7868025 = 9014^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 89120221 - 2⁷ = 89120093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89120261) 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, 44560110 + 44560111.

It is an arithmetic number, because the mean of its divisors is an integer number (44560111).

Almost surely, 2^89120221 is an apocalyptic number.

It is an amenable number.

89120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

89120221 is an equidigital number, since it uses as much as digits as its factorization.

89120221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 89120221 is about 9440.3506820457. The cubic root of 89120221 is about 446.6754513631.

It can be divided in two parts, 891 and 20221, that added together give a palindrome (21112).

The spelling of 89120221 in words is "eighty-nine million, one hundred twenty thousand, two hundred twenty-one".