12111112012122 has 24 divisors (see below), whose sum is σ = 26355331097940. Its totient is φ = 4019408352000.

The previous prime is 12111112012091. The next prime is 12111112012141. The reversal of 12111112012122 is 22121021111121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8430550338681 + 3680561673441 = 2903541^2 + 1918479^2 .

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 = 12111112012095 and 12111112012104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1469077879 + ... + 1469086122.

Almost surely, 2^{12111112012122} is an apocalyptic number.

12111112012122 is an abundant number, since it is smaller than the sum of its proper divisors (14244219085818).

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

12111112012122 is a wasteful number, since it uses less digits than its factorization.

12111112012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938164238 (or 2938164235 counting only the distinct ones).

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

Adding to 12111112012122 its reverse (22121021111121), we get a palindrome (34232133123243).

The spelling of 12111112012122 in words is "twelve trillion, one hundred eleven billion, one hundred twelve million, twelve thousand, one hundred twenty-two".