21110201089 has 2 divisors, whose sum is σ = 21110201090. Its totient is φ = 21110201088.

The previous prime is 21110201033. The next prime is 21110201141. The reversal of 21110201089 is 98010201112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13837522689 + 7272678400 = 117633^2 + 85280^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110201089 - 2⁷ = 21110200961 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110201029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555100544 + 10555100545.

It is an arithmetic number, because the mean of its divisors is an integer number (10555100545).

Almost surely, 2^21110201089 is an apocalyptic number.

It is an amenable number.

21110201089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110201089 is an equidigital number, since it uses as much as digits as its factorization.

21110201089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 21110201089 in words is "twenty-one billion, one hundred ten million, two hundred one thousand, eighty-nine".