21241911 has 8 divisors (see below), whose sum is σ = 28445040. Its totient is φ = 14100032.

The previous prime is 21241901. The next prime is 21241921. The reversal of 21241911 is 11914212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21241901) and next prime (21241921).

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 21241911 - 2⁷ = 21241783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241901) 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, 14496 + ... + 15893.

It is an arithmetic number, because the mean of its divisors is an integer number (3555630).

Almost surely, 2^21241911 is an apocalyptic number.

21241911 is a deficient number, since it is larger than the sum of its proper divisors (7203129).

21241911 is a wasteful number, since it uses less digits than its factorization.

21241911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30625.

The product of its digits is 144, while the sum is 21.

The square root of 21241911 is about 4608.8947698987. The cubic root of 21241911 is about 276.9477630474.

The spelling of 21241911 in words is "twenty-one million, two hundred forty-one thousand, nine hundred eleven".