111122122012 has 12 divisors (see below), whose sum is σ = 212142233016. Its totient is φ = 50510055440.

The previous prime is 111122122009. The next prime is 111122122031. The reversal of 111122122012 is 210221221111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262751343 + ... + 1262751430.

It is an arithmetic number, because the mean of its divisors is an integer number (17678519418).

Almost surely, 2^111122122012 is an apocalyptic number.

It is an amenable number.

111122122012 is a deficient number, since it is larger than the sum of its proper divisors (101020111004).

111122122012 is a wasteful number, since it uses less digits than its factorization.

111122122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525502788 (or 2525502786 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111122122012 its reverse (210221221111), we get a palindrome (321343343123).

Subtracting 111122122012 from its reverse (210221221111), we obtain a palindrome (99099099099).

The spelling of 111122122012 in words is "one hundred eleven billion, one hundred twenty-two million, one hundred twenty-two thousand, twelve".