12221231212 has 24 divisors (see below), whose sum is σ = 22168226304. Its totient is φ = 5891333712.

The previous prime is 12221231177. The next prime is 12221231213. The reversal of 12221231212 is 21213212221.

It is a self number, because there is not a number n which added to its sum of digits gives 12221231212.

It is not an unprimeable number, because it can be changed into a prime (12221231213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472528 + ... + 497719.

It is an arithmetic number, because the mean of its divisors is an integer number (923676096).

Almost surely, 2^12221231212 is an apocalyptic number.

It is an amenable number.

12221231212 is a deficient number, since it is larger than the sum of its proper divisors (9946995092).

12221231212 is a wasteful number, since it uses less digits than its factorization.

12221231212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970365 (or 970363 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

Adding to 12221231212 its reverse (21213212221), we get a palindrome (33434443433).

The spelling of 12221231212 in words is "twelve billion, two hundred twenty-one million, two hundred thirty-one thousand, two hundred twelve".