21241120 has 24 divisors (see below), whose sum is σ = 50182524. Its totient is φ = 8496384.

The previous prime is 21241093. The next prime is 21241123. The reversal of 21241120 is 2114212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17539344 + 3701776 = 4188^2 + 1924^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21241120.

It is not an unprimeable number, because it can be changed into a prime (21241123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66219 + ... + 66538.

Almost surely, 2^21241120 is an apocalyptic number.

21241120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21241120 is an abundant number, since it is smaller than the sum of its proper divisors (28941404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21241120 is a wasteful number, since it uses less digits than its factorization.

21241120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132772 (or 132764 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 21241120 is about 4608.8089567696. The cubic root of 21241120 is about 276.9443253718.

Adding to 21241120 its reverse (2114212), we get a palindrome (23355332).

The spelling of 21241120 in words is "twenty-one million, two hundred forty-one thousand, one hundred twenty".