12212072 has 16 divisors (see below), whose sum is σ = 23517060. Its totient is φ = 5940864.

The previous prime is 12212063. The next prime is 12212077. The reversal of 12212072 is 27021221.

It can be written as a sum of positive squares in 2 ways, for example, as 12013156 + 198916 = 3466^2 + 446^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12212072.

It is not an unprimeable number, because it can be changed into a prime (12212077) 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 3 ways as a sum of consecutive naturals, for example, 20333 + ... + 20924.

Almost surely, 2^12212072 is an apocalyptic number.

It is an amenable number.

12212072 is a deficient number, since it is larger than the sum of its proper divisors (11304988).

12212072 is a wasteful number, since it uses less digits than its factorization.

12212072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41300 (or 41296 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 12212072 is about 3494.5775138062. The cubic root of 12212072 is about 230.2836575845.

Adding to 12212072 its reverse (27021221), we get a palindrome (39233293).

The spelling of 12212072 in words is "twelve million, two hundred twelve thousand, seventy-two".