21110011189 has 2 divisors, whose sum is σ = 21110011190. Its totient is φ = 21110011188.

The previous prime is 21110011187. The next prime is 21110011207. The reversal of 21110011189 is 98111001112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19562218225 + 1547792964 = 139865^2 + 39342^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110011189 - 2¹ = 21110011187 is a prime.

Together with 21110011187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110011187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555005594 + 10555005595.

It is an arithmetic number, because the mean of its divisors is an integer number (10555005595).

Almost surely, 2^21110011189 is an apocalyptic number.

It is an amenable number.

21110011189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110011189 is an equidigital number, since it uses as much as digits as its factorization.

21110011189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 25.

The spelling of 21110011189 in words is "twenty-one billion, one hundred ten million, eleven thousand, one hundred eighty-nine".