231032231312321 has 4 divisors (see below), whose sum is σ = 231032622226644. Its totient is φ = 231031840398000.

The previous prime is 231032231312297. The next prime is 231032231312329. The reversal of 231032231312321 is 123213132230132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12204116046721 + 218828115265600 = 3493439^2 + 14792840^2 .

It is a cyclic number.

It is not a de Polignac number, because 231032231312321 - 2⁶ = 231032231312257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231032231312329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194569310 + ... + 195753111.

It is an arithmetic number, because the mean of its divisors is an integer number (57758155556661).

Almost surely, 2^{231032231312321} is an apocalyptic number.

It is an amenable number.

231032231312321 is a deficient number, since it is larger than the sum of its proper divisors (390914323).

231032231312321 is an equidigital number, since it uses as much as digits as its factorization.

231032231312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390914322.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 231032231312321 its reverse (123213132230132), we get a palindrome (354245363542453).

The spelling of 231032231312321 in words is "two hundred thirty-one trillion, thirty-two billion, two hundred thirty-one million, three hundred twelve thousand, three hundred twenty-one".