12223423212 has 144 divisors (see below), whose sum is σ = 38505261312. Its totient is φ = 2930653440.

The previous prime is 12223423189. The next prime is 12223423241. The reversal of 12223423212 is 21232432221.

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 47 ways as a sum of consecutive naturals, for example, 117018 + ... + 195294.

It is an arithmetic number, because the mean of its divisors is an integer number (267397648).

Almost surely, 2^12223423212 is an apocalyptic number.

12223423212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12223423212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19252630656).

12223423212 is an abundant number, since it is smaller than the sum of its proper divisors (26281838100).

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

12223423212 is a wasteful number, since it uses less digits than its factorization.

12223423212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78328 (or 78313 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

Adding to 12223423212 its reverse (21232432221), we get a palindrome (33455855433).

Subtracting 12223423212 from its reverse (21232432221), we obtain a palindrome (9009009009).

The spelling of 12223423212 in words is "twelve billion, two hundred twenty-three million, four hundred twenty-three thousand, two hundred twelve".