21124150 has 48 divisors (see below), whose sum is σ = 40979520. Its totient is φ = 8096000.

The previous prime is 21124141. The next prime is 21124163. The reversal of 21124150 is 5142112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209100 + ... + 209200.

It is an arithmetic number, because the mean of its divisors is an integer number (853740).

Almost surely, 2^21124150 is an apocalyptic number.

21124150 is a deficient number, since it is larger than the sum of its proper divisors (19855370).

21124150 is a wasteful number, since it uses less digits than its factorization.

21124150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 21124150 is about 4596.1016089725. The cubic root of 21124150 is about 276.4350329746.

Adding to 21124150 its reverse (5142112), we get a palindrome (26266262).

The spelling of 21124150 in words is "twenty-one million, one hundred twenty-four thousand, one hundred fifty".