111121300212 has 96 divisors (see below), whose sum is σ = 290565327360. Its totient is φ = 32829874560.

The previous prime is 111121300189. The next prime is 111121300229. The reversal of 111121300212 is 212003121111.

It is a junction number, because it is equal to n+sod(n) for n = 111121300191 and 111121300200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255387 + ... + 536157.

It is an arithmetic number, because the mean of its divisors is an integer number (3026722160).

Almost surely, 2^111121300212 is an apocalyptic number.

111121300212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111121300212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145282663680).

111121300212 is an abundant number, since it is smaller than the sum of its proper divisors (179444027148).

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

111121300212 is a wasteful number, since it uses less digits than its factorization.

111121300212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280893 (or 280891 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 111121300212 its reverse (212003121111), we get a palindrome (323124421323).

The spelling of 111121300212 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred thousand, two hundred twelve".