12271212 has 36 divisors (see below), whose sum is σ = 32845176. Its totient is φ = 3849600.

The previous prime is 12271201. The next prime is 12271219. The reversal of 12271212 is 21217221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12271219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9414 + ... + 10637.

It is an arithmetic number, because the mean of its divisors is an integer number (912366).

Almost surely, 2^12271212 is an apocalyptic number.

12271212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12271212 is an abundant number, since it is smaller than the sum of its proper divisors (20573964).

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

12271212 is a wasteful number, since it uses less digits than its factorization.

12271212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20078 (or 20073 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 12271212 is about 3503.0289750443. The cubic root of 12271212 is about 230.6547944410.

Adding to 12271212 its reverse (21217221), we get a palindrome (33488433).

The spelling of 12271212 in words is "twelve million, two hundred seventy-one thousand, two hundred twelve".