111121133312 has 72 divisors (see below), whose sum is σ = 253960753536. Its totient is φ = 47535860736.

The previous prime is 111121133311. The next prime is 111121133363. The reversal of 111121133312 is 213331121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121133311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923543 + ... + 1036905.

It is an arithmetic number, because the mean of its divisors is an integer number (3527232688).

Almost surely, 2^111121133312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111121133312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126980376768).

111121133312 is an abundant number, since it is smaller than the sum of its proper divisors (142839620224).

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

111121133312 is an equidigital number, since it uses as much as digits as its factorization.

111121133312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113933 (or 113919 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

Adding to 111121133312 its reverse (213331121111), we get a palindrome (324452254423).

The spelling of 111121133312 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred thirty-three thousand, three hundred twelve".