21110117 has 8 divisors (see below), whose sum is σ = 24157056. Its totient is φ = 18070992.

The previous prime is 21110099. The next prime is 21110123. The reversal of 21110117 is 71101112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21110117 - 2¹⁰ = 21109093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6023 + ... + 8859.

It is an arithmetic number, because the mean of its divisors is an integer number (3019632).

Almost surely, 2^21110117 is an apocalyptic number.

It is an amenable number.

21110117 is a deficient number, since it is larger than the sum of its proper divisors (3046939).

21110117 is a wasteful number, since it uses less digits than its factorization.

21110117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907.

The product of its (nonzero) digits is 14, while the sum is 14.

The square root of 21110117 is about 4594.5747354897. The cubic root of 21110117 is about 276.3738064931.

Adding to 21110117 its reverse (71101112), we get a palindrome (92211229).

The spelling of 21110117 in words is "twenty-one million, one hundred ten thousand, one hundred seventeen".