12231212 has 48 divisors (see below), whose sum is σ = 26154240. Its totient is φ = 4888512.

The previous prime is 12231203. The next prime is 12231227. The reversal of 12231212 is 21213221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44018 + ... + 44294.

It is an arithmetic number, because the mean of its divisors is an integer number (544880).

Almost surely, 2^12231212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12231212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13077120).

12231212 is an abundant number, since it is smaller than the sum of its proper divisors (13923028).

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

12231212 is a wasteful number, since it uses less digits than its factorization.

12231212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 388 counting only the distinct ones).

The product of its digits is 48, while the sum is 14.

The square root of 12231212 is about 3497.3149700878. The cubic root of 12231212 is about 230.4039027679.

Adding to 12231212 its reverse (21213221), we get a palindrome (33444433).

Subtracting 12231212 from its reverse (21213221), we obtain a square (8982009 = 2997²).

The spelling of 12231212 in words is "twelve million, two hundred thirty-one thousand, two hundred twelve".