21301042205 has 8 divisors (see below), whose sum is σ = 25809418752. Its totient is φ = 16875388368.

The previous prime is 21301042157. The next prime is 21301042241. The reversal of 21301042205 is 50224010312.

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-21301042205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 20680109 + ... + 20681138.

It is an arithmetic number, because the mean of its divisors is an integer number (3226177344).

Almost surely, 2^21301042205 is an apocalyptic number.

It is an amenable number.

21301042205 is a deficient number, since it is larger than the sum of its proper divisors (4508376547).

21301042205 is a wasteful number, since it uses less digits than its factorization.

21301042205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41361355.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 21301042205 its reverse (50224010312), we get a palindrome (71525052517).

The spelling of 21301042205 in words is "twenty-one billion, three hundred one million, forty-two thousand, two hundred five".