12111210 has 48 divisors (see below), whose sum is σ = 32349096. Its totient is φ = 3141504.

The previous prime is 12111199. The next prime is 12111217. The reversal of 12111210 is 1211121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8838729 + 3272481 = 2973^2 + 1809^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12111192 and 12111201.

It is not an unprimeable number, because it can be changed into a prime (12111217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1512 + ... + 5148.

Almost surely, 2^12111210 is an apocalyptic number.

12111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12111210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16174548).

12111210 is an abundant number, since it is smaller than the sum of its proper divisors (20237886).

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

12111210 is a wasteful number, since it uses less digits than its factorization.

12111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687 (or 3684 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 12111210 is about 3480.1163773644. The cubic root of 12111210 is about 229.6479175161.

Adding to 12111210 its reverse (1211121), we get a palindrome (13322331).

It can be divided in two parts, 12111 and 210, that added together give a palindrome (12321).

The spelling of 12111210 in words is "twelve million, one hundred eleven thousand, two hundred ten".