12152212 has 24 divisors (see below), whose sum is σ = 22669416. Its totient is φ = 5680128.

The previous prime is 12152209. The next prime is 12152213. The reversal of 12152212 is 21225121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9449476 + 2702736 = 3074^2 + 1644^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12152213) 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 7 ways as a sum of consecutive naturals, for example, 11248 + ... + 12280.

It is an arithmetic number, because the mean of its divisors is an integer number (944559).

Almost surely, 2^12152212 is an apocalyptic number.

It is an amenable number.

12152212 is a deficient number, since it is larger than the sum of its proper divisors (10517204).

12152212 is a wasteful number, since it uses less digits than its factorization.

12152212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 1225 counting only the distinct ones).

The product of its digits is 80, while the sum is 16.

The square root of 12152212 is about 3486.0022948931. The cubic root of 12152212 is about 229.9067801181.

Subtracting from 12152212 its sum of digits (16), we obtain a square (12152196 = 3486²).

Adding to 12152212 its reverse (21225121), we get a palindrome (33377333).

The spelling of 12152212 in words is "twelve million, one hundred fifty-two thousand, two hundred twelve".