12211712 has 80 divisors (see below), whose sum is σ = 27400032. Its totient is φ = 5406720.

The previous prime is 12211709. The next prime is 12211721. The reversal of 12211712 is 21711221.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200162 + ... + 200222.

Almost surely, 2^12211712 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 12211712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13700016).

12211712 is an abundant number, since it is smaller than the sum of its proper divisors (15188320).

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

12211712 is an equidigital number, since it uses as much as digits as its factorization.

12211712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 103 counting only the distinct ones).

The product of its digits is 56, while the sum is 17.

The square root of 12211712 is about 3494.5260050542. The cubic root of 12211712 is about 230.2813947162.

Adding to 12211712 its reverse (21711221), we get a palindrome (33922933).

The spelling of 12211712 in words is "twelve million, two hundred eleven thousand, seven hundred twelve".