21110089 has 16 divisors (see below), whose sum is σ = 28344960. Its totient is φ = 15183360.

The previous prime is 21110071. The next prime is 21110093. The reversal of 21110089 is 98001112.

It is a cyclic number.

It is not a de Polignac number, because 21110089 - 2¹⁷ = 20979017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9544 + ... + 11545.

It is an arithmetic number, because the mean of its divisors is an integer number (1771560).

Almost surely, 2^21110089 is an apocalyptic number.

It is an amenable number.

21110089 is a deficient number, since it is larger than the sum of its proper divisors (7234871).

21110089 is a wasteful number, since it uses less digits than its factorization.

21110089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21120.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 21110089 is about 4594.5716884167. The cubic root of 21110089 is about 276.3736843010.

The spelling of 21110089 in words is "twenty-one million, one hundred ten thousand, eighty-nine".