12211172 has 6 divisors (see below), whose sum is σ = 21369558. Its totient is φ = 6105584.

The previous prime is 12211169. The next prime is 12211193. The reversal of 12211172 is 27111221.

It can be written as a sum of positive squares in only one way, i.e., 12208036 + 3136 = 3494^2 + 56^2 .

It is a super-2 number, since 2×12211172² = 298225443227168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12211172.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1526393 + ... + 1526400.

It is an arithmetic number, because the mean of its divisors is an integer number (3561593).

Almost surely, 2^12211172 is an apocalyptic number.

It is an amenable number.

12211172 is a deficient number, since it is larger than the sum of its proper divisors (9158386).

12211172 is a wasteful number, since it uses less digits than its factorization.

12211172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052797 (or 3052795 counting only the distinct ones).

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

The square root of 12211172 is about 3494.4487405026. The cubic root of 12211172 is about 230.2780003304.

Adding to 12211172 its reverse (27111221), we get a palindrome (39322393).

The spelling of 12211172 in words is "twelve million, two hundred eleven thousand, one hundred seventy-two".