321232211213 has 4 divisors (see below), whose sum is σ = 321788940060. Its totient is φ = 320675482368.

The previous prime is 321232211197. The next prime is 321232211239. The reversal of 321232211213 is 312112232123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312112232123 = 719 ⋅434092117.

It can be written as a sum of positive squares in 2 ways, for example, as 212910262084 + 108321949129 = 461422^2 + 329123^2 .

It is a cyclic number.

It is not a de Polignac number, because 321232211213 - 2⁴ = 321232211197 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 (321232211273) 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, 278363558 + ... + 278364711.

It is an arithmetic number, because the mean of its divisors is an integer number (80447235015).

Almost surely, 2^321232211213 is an apocalyptic number.

It is an amenable number.

321232211213 is a deficient number, since it is larger than the sum of its proper divisors (556728847).

321232211213 is an equidigital number, since it uses as much as digits as its factorization.

321232211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556728846.

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

Adding to 321232211213 its reverse (312112232123), we get a palindrome (633344443336).

The spelling of 321232211213 in words is "three hundred twenty-one billion, two hundred thirty-two million, two hundred eleven thousand, two hundred thirteen".