12213213312 has 32 divisors (see below), whose sum is σ = 32441348880. Its totient is φ = 4071070976.

The previous prime is 12213213301. The next prime is 12213213347. The reversal of 12213213312 is 21331231221.

It is a tau number, because it is divible by the number of its divisors (32).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15902238 + ... + 15903005.

Almost surely, 2^12213213312 is an apocalyptic number.

12213213312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12213213312 is an abundant number, since it is smaller than the sum of its proper divisors (20228135568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12213213312 is an equidigital number, since it uses as much as digits as its factorization.

12213213312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31805260 (or 31805248 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 12213213312 its reverse (21331231221), we get a palindrome (33544444533).

The spelling of 12213213312 in words is "twelve billion, two hundred thirteen million, two hundred thirteen thousand, three hundred twelve".