12221122012 has 48 divisors (see below), whose sum is σ = 24688097280. Its totient is φ = 5235062400.

The previous prime is 12221121947. The next prime is 12221122037. The reversal of 12221122012 is 21022112221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 121408 + ... + 197944.

It is an arithmetic number, because the mean of its divisors is an integer number (514335360).

Almost surely, 2^12221122012 is an apocalyptic number.

It is an amenable number.

12221122012 is an abundant number, since it is smaller than the sum of its proper divisors (12466975268).

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

12221122012 is a wasteful number, since it uses less digits than its factorization.

12221122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76762 (or 76760 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12221122012 its reverse (21022112221), we get a palindrome (33243234233).

The spelling of 12221122012 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, twelve".