21110241 has 8 divisors (see below), whose sum is σ = 28239904. Its totient is φ = 14027040.

The previous prime is 21110233. The next prime is 21110249. The reversal of 21110241 is 14201112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21110233) and next prime (21110249).

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

It is not a de Polignac number, because 21110241 - 2³ = 21110233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21110249) 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, 10540 + ... + 12381.

It is an arithmetic number, because the mean of its divisors is an integer number (3529988).

Almost surely, 2^21110241 is an apocalyptic number.

It is an amenable number.

21110241 is a deficient number, since it is larger than the sum of its proper divisors (7129663).

21110241 is a wasteful number, since it uses less digits than its factorization.

21110241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23231.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 21110241 is about 4594.5882296458. The cubic root of 21110241 is about 276.3743476283.

Adding to 21110241 its reverse (14201112), we get a palindrome (35311353).

The spelling of 21110241 in words is "twenty-one million, one hundred ten thousand, two hundred forty-one".