111121021212112 has 20 divisors (see below), whose sum is σ = 227961506751876. Its totient is φ = 52292245276160.

The previous prime is 111121021212077. The next prime is 111121021212209. The reversal of 111121021212112 is 211212120121111.

It can be written as a sum of positive squares in 2 ways, for example, as 102237497897536 + 8883523314576 = 10111256^2 + 2980524^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111121021212112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204266582839 + ... + 204266583382.

Almost surely, 2^{111121021212112} is an apocalyptic number.

It is an amenable number.

111121021212112 is an abundant number, since it is smaller than the sum of its proper divisors (116840485539764).

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

111121021212112 is a wasteful number, since it uses less digits than its factorization.

111121021212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408533166246 (or 408533166240 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111121021212112 its reverse (211212120121111), we get a palindrome (322333141333223).

The spelling of 111121021212112 in words is "one hundred eleven trillion, one hundred twenty-one billion, twenty-one million, two hundred twelve thousand, one hundred twelve".