21124004143 has 8 divisors (see below), whose sum is σ = 24399919440. Its totient is φ = 18074014080.

The previous prime is 21124004141. The next prime is 21124004197. The reversal of 21124004143 is 34140042112.

It is a happy number.

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 21124004143 - 2¹ = 21124004141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124004141) 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, 56481108 + ... + 56481481.

It is an arithmetic number, because the mean of its divisors is an integer number (3049989930).

Almost surely, 2^21124004143 is an apocalyptic number.

21124004143 is a deficient number, since it is larger than the sum of its proper divisors (3275915297).

21124004143 is a wasteful number, since it uses less digits than its factorization.

21124004143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112962617.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21124004143 its reverse (34140042112), we get a palindrome (55264046255).

The spelling of 21124004143 in words is "twenty-one billion, one hundred twenty-four million, four thousand, one hundred forty-three".