12020211228 has 24 divisors (see below), whose sum is σ = 28699420288. Its totient is φ = 3913556976.

The previous prime is 12020211227. The next prime is 12020211251. The reversal of 12020211228 is 82211202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020211221) 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 in 7 ways as a sum of consecutive naturals, for example, 11646976 + ... + 11648007.

Almost surely, 2^12020211228 is an apocalyptic number.

It is an amenable number.

12020211228 is an abundant number, since it is smaller than the sum of its proper divisors (16679209060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12020211228 is a wasteful number, since it uses less digits than its factorization.

12020211228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23295033 (or 23295031 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12020211228 its reverse (82211202021), we get a palindrome (94231413249).

The spelling of 12020211228 in words is "twelve billion, twenty million, two hundred eleven thousand, two hundred twenty-eight".