12212330321 has 4 divisors (see below), whose sum is σ = 12213064500. Its totient is φ = 12211596144.

The previous prime is 12212330303. The next prime is 12212330407. The reversal of 12212330321 is 12303321221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12303321221 = 9551 ⋅1288171.

It can be written as a sum of positive squares in 2 ways, for example, as 8021710096 + 4190620225 = 89564^2 + 64735^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212330321 - 2⁶ = 12212330257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212330293 and 12212330302.

It is not an unprimeable number, because it can be changed into a prime (12212330521) 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, 341546 + ... + 375603.

It is an arithmetic number, because the mean of its divisors is an integer number (3053266125).

Almost surely, 2^12212330321 is an apocalyptic number.

It is an amenable number.

12212330321 is a deficient number, since it is larger than the sum of its proper divisors (734179).

12212330321 is an equidigital number, since it uses as much as digits as its factorization.

12212330321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734178.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12212330321 its reverse (12303321221), we get a palindrome (24515651542).

The spelling of 12212330321 in words is "twelve billion, two hundred twelve million, three hundred thirty thousand, three hundred twenty-one".