21144103 has 8 divisors (see below), whose sum is σ = 22049280. Its totient is φ = 20250720.

The previous prime is 21144083. The next prime is 21144119. The reversal of 21144103 is 30144112.

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 21144103 - 2¹³ = 21135911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144173) 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, 813 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (2756160).

Almost surely, 2^21144103 is an apocalyptic number.

21144103 is a deficient number, since it is larger than the sum of its proper divisors (905177).

21144103 is a wasteful number, since it uses less digits than its factorization.

21144103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5897.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21144103 is about 4598.2717405564. The cubic root of 21144103 is about 276.5220419586.

Adding to 21144103 its reverse (30144112), we get a palindrome (51288215).

Subtracting 21144103 from its reverse (30144112), we obtain a palindrome (9000009).

The spelling of 21144103 in words is "twenty-one million, one hundred forty-four thousand, one hundred three".