232121312321 has 4 divisors (see below), whose sum is σ = 232778880132. Its totient is φ = 231463744512.

The previous prime is 232121312317. The next prime is 232121312377. The reversal of 232121312321 is 123213121232.

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 46735954225 + 185385358096 = 216185^2 + 430564^2 .

It is a cyclic number.

It is not a de Polignac number, because 232121312321 - 2² = 232121312317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232121312821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328783376 + ... + 328784081.

It is an arithmetic number, because the mean of its divisors is an integer number (58194720033).

Almost surely, 2^232121312321 is an apocalyptic number.

It is an amenable number.

232121312321 is a deficient number, since it is larger than the sum of its proper divisors (657567811).

232121312321 is an equidigital number, since it uses as much as digits as its factorization.

232121312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657567810.

The product of its digits is 864, while the sum is 23.

Adding to 232121312321 its reverse (123213121232), we get a palindrome (355334433553).

The spelling of 232121312321 in words is "two hundred thirty-two billion, one hundred twenty-one million, three hundred twelve thousand, three hundred twenty-one".