21143224123 has 8 divisors (see below), whose sum is σ = 24172183040. Its totient is φ = 18116389800.

The previous prime is 21143224087. The next prime is 21143224127. The reversal of 21143224123 is 32142234112.

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 21143224123 - 2⁹ = 21143223611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21143224127) 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, 509763 + ... + 549676.

It is an arithmetic number, because the mean of its divisors is an integer number (3021522880).

Almost surely, 2^21143224123 is an apocalyptic number.

21143224123 is a deficient number, since it is larger than the sum of its proper divisors (3028958917).

21143224123 is a wasteful number, since it uses less digits than its factorization.

21143224123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062297.

The product of its digits is 2304, while the sum is 25.

Adding to 21143224123 its reverse (32142234112), we get a palindrome (53285458235).

The spelling of 21143224123 in words is "twenty-one billion, one hundred forty-three million, two hundred twenty-four thousand, one hundred twenty-three".