12121201111122 has 112 divisors (see below), whose sum is σ = 28879247399040. Its totient is φ = 3800691351936.

The previous prime is 12121201111087. The next prime is 12121201111127. The reversal of 12121201111122 is 22111110212121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12121201111095 and 12121201111104.

It is not an unprimeable number, because it can be changed into a prime (12121201111127) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 46442763 + ... + 46703025.

Almost surely, 2^{12121201111122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121201111122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14439623699520).

12121201111122 is an abundant number, since it is smaller than the sum of its proper divisors (16758046287918).

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

12121201111122 is a wasteful number, since it uses less digits than its factorization.

12121201111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262179 (or 262164 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12121201111122 its reverse (22111110212121), we get a palindrome (34232311323243).

The spelling of 12121201111122 in words is "twelve trillion, one hundred twenty-one billion, two hundred one million, one hundred eleven thousand, one hundred twenty-two".