12322122221 has 4 divisors (see below), whose sum is σ = 12395907552. Its totient is φ = 12248336892.

The previous prime is 12322122217. The next prime is 12322122233. The reversal of 12322122221 is 12222122321.

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: 12222122321 = 61 ⋅200362661.

It is a cyclic number.

It is not a de Polignac number, because 12322122221 - 2² = 12322122217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12322122193 and 12322122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12322122251) 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, 36892415 + ... + 36892748.

It is an arithmetic number, because the mean of its divisors is an integer number (3098976888).

Almost surely, 2^12322122221 is an apocalyptic number.

It is an amenable number.

12322122221 is a deficient number, since it is larger than the sum of its proper divisors (73785331).

12322122221 is an equidigital number, since it uses as much as digits as its factorization.

12322122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73785330.

The product of its digits is 384, while the sum is 20.

Adding to 12322122221 its reverse (12222122321), we get a palindrome (24544244542).

The spelling of 12322122221 in words is "twelve billion, three hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".