12211211212 has 6 divisors (see below), whose sum is σ = 21369619628. Its totient is φ = 6105605604.

The previous prime is 12211211191. The next prime is 12211211219. The reversal of 12211211212 is 21211211221.

It is a super-2 number, since 2×12211211212² (a number of 21 digits) 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 (12211211219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1526401398 + ... + 1526401405.

Almost surely, 2^12211211212 is an apocalyptic number.

It is an amenable number.

12211211212 is a deficient number, since it is larger than the sum of its proper divisors (9158408416).

12211211212 is a wasteful number, since it uses less digits than its factorization.

12211211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052802807 (or 3052802805 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

Adding to 12211211212 its reverse (21211211221), we get a palindrome (33422422433).

Subtracting 12211211212 from its reverse (21211211221), we obtain a palindrome (9000000009).

The spelling of 12211211212 in words is "twelve billion, two hundred eleven million, two hundred eleven thousand, two hundred twelve".