21033424101 has 8 divisors (see below), whose sum is σ = 28463141344. Its totient is φ = 13812994800.

The previous prime is 21033424073. The next prime is 21033424109. The reversal of 21033424101 is 10142433012.

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

It is a de Polignac number, because none of the positive numbers 2^k-21033424101 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 (21033424109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52321750 + ... + 52322151.

It is an arithmetic number, because the mean of its divisors is an integer number (3557892668).

Almost surely, 2^21033424101 is an apocalyptic number.

It is an amenable number.

21033424101 is a deficient number, since it is larger than the sum of its proper divisors (7429717243).

21033424101 is a wasteful number, since it uses less digits than its factorization.

21033424101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104643971.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21033424101 its reverse (10142433012), we get a palindrome (31175857113).

The spelling of 21033424101 in words is "twenty-one billion, thirty-three million, four hundred twenty-four thousand, one hundred one".