12120211221222 has 16 divisors (see below), whose sum is σ = 26105070322800. Its totient is φ = 3729295760352.

The previous prime is 12120211221197. The next prime is 12120211221241. The reversal of 12120211221222 is 22212211202121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 77693661597 + ... + 77693661752.

It is an arithmetic number, because the mean of its divisors is an integer number (1631566895175).

Almost surely, 2^{12120211221222} is an apocalyptic number.

12120211221222 is an abundant number, since it is smaller than the sum of its proper divisors (13984859101578).

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

12120211221222 is a wasteful number, since it uses less digits than its factorization.

12120211221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155387323367.

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

Adding to 12120211221222 its reverse (22212211202121), we get a palindrome (34332422423343).

The spelling of 12120211221222 in words is "twelve trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-two".