21041611 has 8 divisors (see below), whose sum is σ = 21305984. Its totient is φ = 20779200.

The previous prime is 21041609. The next prime is 21041621. The reversal of 21041611 is 11614012.

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 21041611 - 2¹ = 21041609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21041621) 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, 34711 + ... + 35311.

It is an arithmetic number, because the mean of its divisors is an integer number (2663248).

Almost surely, 2^21041611 is an apocalyptic number.

21041611 is a deficient number, since it is larger than the sum of its proper divisors (264373).

21041611 is a wasteful number, since it uses less digits than its factorization.

21041611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981.

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

The square root of 21041611 is about 4587.1135804556. The cubic root of 21041611 is about 276.0745221647.

Adding to 21041611 its reverse (11614012), we get a palindrome (32655623).

The spelling of 21041611 in words is "twenty-one million, forty-one thousand, six hundred eleven".