21232230230231 has 4 divisors (see below), whose sum is σ = 21233091288600. Its totient is φ = 21231369171864.

The previous prime is 21232230230207. The next prime is 21232230230297. The reversal of 21232230230231 is 13203203223212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21232230230231 - 2¹⁰ = 21232230229207 is a prime.

It is a super-2 number, since 2×21232230230231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21232230230231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232230230831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430492196 + ... + 430541513.

It is an arithmetic number, because the mean of its divisors is an integer number (5308272822150).

Almost surely, 2^{21232230230231} is an apocalyptic number.

21232230230231 is a deficient number, since it is larger than the sum of its proper divisors (861058369).

21232230230231 is an equidigital number, since it uses as much as digits as its factorization.

21232230230231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861058368.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21232230230231 its reverse (13203203223212), we get a palindrome (34435433453443).

The spelling of 21232230230231 in words is "twenty-one trillion, two hundred thirty-two billion, two hundred thirty million, two hundred thirty thousand, two hundred thirty-one".