21110441 has 8 divisors (see below), whose sum is σ = 23076768. Its totient is φ = 19152000.

The previous prime is 21110437. The next prime is 21110443. The reversal of 21110441 is 14401112.

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 21110441 - 2² = 21110437 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110443) 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, 4601 + ... + 7961.

It is an arithmetic number, because the mean of its divisors is an integer number (2884596).

Almost surely, 2^21110441 is an apocalyptic number.

It is an amenable number.

21110441 is a deficient number, since it is larger than the sum of its proper divisors (1966327).

21110441 is a wasteful number, since it uses less digits than its factorization.

21110441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 21110441 is about 4594.6099943303. The cubic root of 21110441 is about 276.3752204227.

Adding to 21110441 its reverse (14401112), we get a palindrome (35511553).

The spelling of 21110441 in words is "twenty-one million, one hundred ten thousand, four hundred forty-one".