12311212 has 6 divisors (see below), whose sum is σ = 21544628. Its totient is φ = 6155604.

The previous prime is 12311209. The next prime is 12311219. The reversal of 12311212 is 21211321.

It is a junction number, because it is equal to n+sod(n) for n = 12311192 and 12311201.

It is not an unprimeable number, because it can be changed into a prime (12311219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1538898 + ... + 1538905.

Almost surely, 2^12311212 is an apocalyptic number.

It is an amenable number.

12311212 is a deficient number, since it is larger than the sum of its proper divisors (9233416).

12311212 is a wasteful number, since it uses less digits than its factorization.

12311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077807 (or 3077805 counting only the distinct ones).

The product of its digits is 24, while the sum is 13.

The square root of 12311212 is about 3508.7336747037. The cubic root of 12311212 is about 230.9051414900.

Adding to 12311212 its reverse (21211321), we get a palindrome (33522533).

The spelling of 12311212 in words is "twelve million, three hundred eleven thousand, two hundred twelve".