12211144 has 16 divisors (see below), whose sum is σ = 24977520. Its totient is φ = 5550480.

The previous prime is 12211141. The next prime is 12211159. The reversal of 12211144 is 44111221.

It is a happy number.

12211144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12211144² = 298224075577472, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12211141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69294 + ... + 69469.

It is an arithmetic number, because the mean of its divisors is an integer number (1561095).

Almost surely, 2^12211144 is an apocalyptic number.

It is an amenable number.

12211144 is an abundant number, since it is smaller than the sum of its proper divisors (12766376).

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

12211144 is a wasteful number, since it uses less digits than its factorization.

12211144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138780 (or 138776 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 12211144 is about 3494.4447341459. Note that the first 3 decimals coincide. The cubic root of 12211144 is about 230.2778243224.

Adding to 12211144 its reverse (44111221), we get a palindrome (56322365).

The spelling of 12211144 in words is "twelve million, two hundred eleven thousand, one hundred forty-four".