21230232223205 has 8 divisors (see below), whose sum is σ = 25638547959672. Its totient is φ = 16876006250688.

The previous prime is 21230232223201. The next prime is 21230232223241. The reversal of 21230232223205 is 50232223203212.

It can be written as a sum of positive squares in 4 ways, for example, as 3158219471044 + 18072012752161 = 1777138^2 + 4251119^2 .

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 21230232223205 - 2² = 21230232223201 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 (21230232223201) 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, 13522440122 + ... + 13522441691.

It is an arithmetic number, because the mean of its divisors is an integer number (3204818494959).

Almost surely, 2^{21230232223205} is an apocalyptic number.

It is an amenable number.

21230232223205 is a deficient number, since it is larger than the sum of its proper divisors (4408315736467).

21230232223205 is a wasteful number, since it uses less digits than its factorization.

21230232223205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27044881975.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 21230232223205 its reverse (50232223203212), we get a palindrome (71462455426417).

The spelling of 21230232223205 in words is "twenty-one trillion, two hundred thirty billion, two hundred thirty-two million, two hundred twenty-three thousand, two hundred five".