21043124101 has 8 divisors (see below), whose sum is σ = 21772262880. Its totient is φ = 20314219632.

The previous prime is 21043124099. The next prime is 21043124111. The reversal of 21043124101 is 10142134012.

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 21043124101 - 2¹ = 21043124099 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 (21043124111) 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, 135046 + ... + 245608.

It is an arithmetic number, because the mean of its divisors is an integer number (2721532860).

Almost surely, 2^21043124101 is an apocalyptic number.

It is an amenable number.

21043124101 is a deficient number, since it is larger than the sum of its proper divisors (729138779).

21043124101 is a wasteful number, since it uses less digits than its factorization.

21043124101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117155.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21043124101 its reverse (10142134012), we get a palindrome (31185258113).

The spelling of 21043124101 in words is "twenty-one billion, forty-three million, one hundred twenty-four thousand, one hundred one".