12121110121222 has 16 divisors (see below), whose sum is σ = 18569089516032. Its totient is φ = 5931421677000.

The previous prime is 12121110121163. The next prime is 12121110121271. The reversal of 12121110121222 is 22212101112121.

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 12121110121222.

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 7 ways as a sum of consecutive naturals, for example, 1032463 + ... + 5030725.

It is an arithmetic number, because the mean of its divisors is an integer number (1160568094752).

Almost surely, 2^{12121110121222} is an apocalyptic number.

12121110121222 is a deficient number, since it is larger than the sum of its proper divisors (6447979394810).

12121110121222 is a wasteful number, since it uses less digits than its factorization.

12121110121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030563.

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

Adding to 12121110121222 its reverse (22212101112121), we get a palindrome (34333211233343).

The spelling of 12121110121222 in words is "twelve trillion, one hundred twenty-one billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-two".