12213243312 has 40 divisors (see below), whose sum is σ = 31555401456. Its totient is φ = 4070497536.

The previous prime is 12213243311. The next prime is 12213243313. The reversal of 12213243312 is 21334231221.

It is an interprime number because it is at equal distance from previous prime (12213243311) and next prime (12213243313).

It is a super-2 number, since 2×12213243312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is not an unprimeable number, because it can be changed into a prime (12213243311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437518 + ... + 464594.

Almost surely, 2^12213243312 is an apocalyptic number.

12213243312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12213243312 is an abundant number, since it is smaller than the sum of its proper divisors (19342158144).

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

12213243312 is a wasteful number, since it uses less digits than its factorization.

12213243312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36485 (or 36479 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 12213243312 its reverse (21334231221), we get a palindrome (33547474533).

The spelling of 12213243312 in words is "twelve billion, two hundred thirteen million, two hundred forty-three thousand, three hundred twelve".