21102201089 has 2 divisors, whose sum is σ = 21102201090. Its totient is φ = 21102201088.

The previous prime is 21102201073. The next prime is 21102201091. The reversal of 21102201089 is 98010220112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10571952400 + 10530248689 = 102820^2 + 102617^2 .

It is a cyclic number.

It is not a de Polignac number, because 21102201089 - 2⁴ = 21102201073 is a prime.

Together with 21102201091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21102251089) 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, 10551100544 + 10551100545.

It is an arithmetic number, because the mean of its divisors is an integer number (10551100545).

Almost surely, 2^21102201089 is an apocalyptic number.

It is an amenable number.

21102201089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102201089 is an equidigital number, since it uses as much as digits as its factorization.

21102201089 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 26.

The spelling of 21102201089 in words is "twenty-one billion, one hundred two million, two hundred one thousand, eighty-nine".