21116041 has 8 divisors (see below), whose sum is σ = 21548160. Its totient is φ = 20686512.

The previous prime is 21115999. The next prime is 21116059. The reversal of 21116041 is 14061112.

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 21116041 - 2¹¹ = 21113993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26931 + ... + 27703.

It is an arithmetic number, because the mean of its divisors is an integer number (2693520).

Almost surely, 2^21116041 is an apocalyptic number.

It is an amenable number.

21116041 is a deficient number, since it is larger than the sum of its proper divisors (432119).

21116041 is an equidigital number, since it uses as much as digits as its factorization.

21116041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21116041 is about 4595.2193636430. The cubic root of 21116041 is about 276.3996564257.

Adding to 21116041 its reverse (14061112), we get a palindrome (35177153).

The spelling of 21116041 in words is "twenty-one million, one hundred sixteen thousand, forty-one".