12213213223 has 4 divisors (see below), whose sum is σ = 12245438440. Its totient is φ = 12180988008.

The previous prime is 12213213217. The next prime is 12213213277. The reversal of 12213213223 is 32231231221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12213213223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12213213194 and 12213213203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213210223) 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, 16112040 + ... + 16112797.

It is an arithmetic number, because the mean of its divisors is an integer number (3061359610).

Almost surely, 2^12213213223 is an apocalyptic number.

12213213223 is a deficient number, since it is larger than the sum of its proper divisors (32225217).

12213213223 is an equidigital number, since it uses as much as digits as its factorization.

12213213223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32225216.

The product of its digits is 864, while the sum is 22.

Adding to 12213213223 its reverse (32231231221), we get a palindrome (44444444444).

The spelling of 12213213223 in words is "twelve billion, two hundred thirteen million, two hundred thirteen thousand, two hundred twenty-three".