111121221212112 has 80 divisors (see below), whose sum is σ = 295267645188992. Its totient is φ = 35984792194560.

The previous prime is 111121221212087. The next prime is 111121221212117. The reversal of 111121221212112 is 211212122121111.

It is a super-2 number, since 2×111121221212112² (a number of 29 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121221212117) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 46154548 + ... + 48502419.

Almost surely, 2^{111121221212112} is an apocalyptic number.

111121221212112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111121221212112 is an abundant number, since it is smaller than the sum of its proper divisors (184146423976880).

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

111121221212112 is a wasteful number, since it uses less digits than its factorization.

111121221212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94657676 (or 94657670 counting only the distinct ones).

The product of its digits is 64, while the sum is 21.

Adding to 111121221212112 its reverse (211212122121111), we get a palindrome (322333343333223).

The spelling of 111121221212112 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twelve".