111121012210012 has 72 divisors (see below), whose sum is σ = 227532018714000. Its totient is φ = 47345914215936.

The previous prime is 111121012209943. The next prime is 111121012210037. The reversal of 111121012210012 is 210012210121111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20641939 + ... + 25462357.

Almost surely, 2^{111121012210012} 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 111121012210012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113766009357000).

111121012210012 is an abundant number, since it is smaller than the sum of its proper divisors (116411006503988).

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

111121012210012 is a wasteful number, since it uses less digits than its factorization.

111121012210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821123 (or 4821114 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111121012210012 its reverse (210012210121111), we get a palindrome (321133222331123).

The spelling of 111121012210012 in words is "one hundred eleven trillion, one hundred twenty-one billion, twelve million, two hundred ten thousand, twelve".