12021211111222 has 24 divisors (see below), whose sum is σ = 19161771263280. Its totient is φ = 5655012877440.

The previous prime is 12021211111199. The next prime is 12021211111229. The reversal of 12021211111222 is 22211111212021.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021211111222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021211111229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2112697 + ... + 5339092.

It is an arithmetic number, because the mean of its divisors is an integer number (798407135970).

Almost surely, 2^{12021211111222} is an apocalyptic number.

12021211111222 is a deficient number, since it is larger than the sum of its proper divisors (7140560152058).

12021211111222 is a wasteful number, since it uses less digits than its factorization.

12021211111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7454616 (or 7454599 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12021211111222 its reverse (22211111212021), we get a palindrome (34232322323243).

The spelling of 12021211111222 in words is "twelve trillion, twenty-one billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty-two".