21110424089 has 2 divisors, whose sum is σ = 21110424090. Its totient is φ = 21110424088.

The previous prime is 21110424007. The next prime is 21110424091. The reversal of 21110424089 is 98042401112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11372089600 + 9738334489 = 106640^2 + 98683^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110424089 - 2⁸ = 21110423833 is a prime.

Together with 21110424091, 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 (21110424589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555212044 + 10555212045.

It is an arithmetic number, because the mean of its divisors is an integer number (10555212045).

Almost surely, 2^21110424089 is an apocalyptic number.

It is an amenable number.

21110424089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110424089 is an equidigital number, since it uses as much as digits as its factorization.

21110424089 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 21110424089 in words is "twenty-one billion, one hundred ten million, four hundred twenty-four thousand, eighty-nine".