231310232202221 has 4 divisors (see below), whose sum is σ = 231311093502912. Its totient is φ = 231309370901532.

The previous prime is 231310232202199. The next prime is 231310232202239. The reversal of 231310232202221 is 122202232013132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231310232202221 - 2³⁴ = 231293052333037 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 (231310232202421) 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, 430247381 + ... + 430784666.

It is an arithmetic number, because the mean of its divisors is an integer number (57827773375728).

Almost surely, 2^{231310232202221} is an apocalyptic number.

It is an amenable number.

231310232202221 is a deficient number, since it is larger than the sum of its proper divisors (861300691).

231310232202221 is an equidigital number, since it uses as much as digits as its factorization.

231310232202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861300690.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 231310232202221 its reverse (122202232013132), we get a palindrome (353512464215353).

The spelling of 231310232202221 in words is "two hundred thirty-one trillion, three hundred ten billion, two hundred thirty-two million, two hundred two thousand, two hundred twenty-one".