12221000222212 has 12 divisors (see below), whose sum is σ = 21540611903440. Its totient is φ = 6066539678376.

The previous prime is 12221000222201. The next prime is 12221000222213. The reversal of 12221000222212 is 21222200012221.

It is a self number, because there is not a number n which added to its sum of digits gives 12221000222212.

It is not an unprimeable number, because it can be changed into a prime (12221000222213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10990107558 + ... + 10990108669.

Almost surely, 2^{12221000222212} is an apocalyptic number.

It is an amenable number.

12221000222212 is a deficient number, since it is larger than the sum of its proper divisors (9319611681228).

12221000222212 is a wasteful number, since it uses less digits than its factorization.

12221000222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21980216370 (or 21980216368 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12221000222212 its reverse (21222200012221), we get a palindrome (33443200234433).

The spelling of 12221000222212 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty-two thousand, two hundred twelve".