21107041 has 8 divisors (see below), whose sum is σ = 21897000. Its totient is φ = 20321280.

The previous prime is 21107029. The next prime is 21107083. The reversal of 21107041 is 14070112.

It can be written as a sum of positive squares in 4 ways, for example, as 6780816 + 14326225 = 2604^2 + 3785^2 .

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 21107041 - 2²¹ = 19009889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21107341) 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, 12211 + ... + 13831.

It is an arithmetic number, because the mean of its divisors is an integer number (2737125).

Almost surely, 2^21107041 is an apocalyptic number.

It is an amenable number.

21107041 is a deficient number, since it is larger than the sum of its proper divisors (789959).

21107041 is a wasteful number, since it uses less digits than its factorization.

21107041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 21107041 is about 4594.2399806714. The cubic root of 21107041 is about 276.3603821695.

Adding to 21107041 its reverse (14070112), we get a palindrome (35177153).

The spelling of 21107041 in words is "twenty-one million, one hundred seven thousand, forty-one".