12221222012 has 24 divisors (see below), whose sum is σ = 21448417200. Its totient is φ = 6093129600.

The previous prime is 12221222011. The next prime is 12221222053. The reversal of 12221222012 is 21022212221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221222011) 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, 2394239 + ... + 2399337.

It is an arithmetic number, because the mean of its divisors is an integer number (893684050).

Almost surely, 2^12221222012 is an apocalyptic number.

It is an amenable number.

12221222012 is a deficient number, since it is larger than the sum of its proper divisors (9227195188).

12221222012 is a wasteful number, since it uses less digits than its factorization.

12221222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6701 (or 6699 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12221222012 its reverse (21022212221), we get a palindrome (33243434233).

The spelling of 12221222012 in words is "twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, twelve".