21141223 has 8 divisors (see below), whose sum is σ = 21643200. Its totient is φ = 20643168.

The previous prime is 21141161. The next prime is 21141227. The reversal of 21141223 is 32214112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21141223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21141197 and 21141206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11833 + ... + 13501.

It is an arithmetic number, because the mean of its divisors is an integer number (2705400).

Almost surely, 2^21141223 is an apocalyptic number.

21141223 is a deficient number, since it is larger than the sum of its proper divisors (501977).

21141223 is a wasteful number, since it uses less digits than its factorization.

21141223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961.

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

The square root of 21141223 is about 4597.9585687564. The cubic root of 21141223 is about 276.5094865329.

Adding to 21141223 its reverse (32214112), we get a palindrome (53355335).

The spelling of 21141223 in words is "twenty-one million, one hundred forty-one thousand, two hundred twenty-three".