12212242321 has 4 divisors (see below), whose sum is σ = 12472077312. Its totient is φ = 11952407332.

The previous prime is 12212242313. The next prime is 12212242373. The reversal of 12212242321 is 12324221221.

12212242321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12324221221 = 13 ⋅948017017.

It is a cyclic number.

It is not a de Polignac number, because 12212242321 - 2³ = 12212242313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212242292 and 12212242301.

It is not an unprimeable number, because it can be changed into a prime (12212243321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129917425 + ... + 129917518.

It is an arithmetic number, because the mean of its divisors is an integer number (3118019328).

Almost surely, 2^12212242321 is an apocalyptic number.

It is an amenable number.

12212242321 is a deficient number, since it is larger than the sum of its proper divisors (259834991).

12212242321 is an equidigital number, since it uses as much as digits as its factorization.

12212242321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259834990.

The product of its digits is 768, while the sum is 22.

Adding to 12212242321 its reverse (12324221221), we get a palindrome (24536463542).

The spelling of 12212242321 in words is "twelve billion, two hundred twelve million, two hundred forty-two thousand, three hundred twenty-one".