12120111110121 has 48 divisors (see below), whose sum is σ = 18822601534464. Its totient is φ = 6916916746656.

The previous prime is 12120111110119. The next prime is 12120111110167. The reversal of 12120111110121 is 12101111102121.

It is not a de Polignac number, because 12120111110121 - 2¹ = 12120111110119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12120111110121.

It is not an unprimeable number, because it can be changed into a prime (12120111160121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 708479850 + ... + 708496956.

It is an arithmetic number, because the mean of its divisors is an integer number (392137531968).

Almost surely, 2^{12120111110121} is an apocalyptic number.

It is an amenable number.

12120111110121 is a deficient number, since it is larger than the sum of its proper divisors (6702490424343).

12120111110121 is a wasteful number, since it uses less digits than its factorization.

12120111110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23010 (or 23003 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12120111110121 its reverse (12101111102121), we get a palindrome (24221222212242).

The spelling of 12120111110121 in words is "twelve trillion, one hundred twenty billion, one hundred eleven million, one hundred ten thousand, one hundred twenty-one".