111212102112012 has 72 divisors (see below), whose sum is σ = 317250824239440. Its totient is φ = 32538546069120.

The previous prime is 111212102111947. The next prime is 111212102112019. The reversal of 111212102112012 is 210211201212111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (111212102112019) 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 23 ways as a sum of consecutive naturals, for example, 4842034063 + ... + 4842057030.

It is an arithmetic number, because the mean of its divisors is an integer number (4406261447770).

Almost surely, 2^{111212102112012} is an apocalyptic number.

111212102112012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111212102112012 is an abundant number, since it is smaller than the sum of its proper divisors (206038722127428).

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

111212102112012 is a wasteful number, since it uses less digits than its factorization.

111212102112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9684091143 (or 9684091138 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111212102112012 its reverse (210211201212111), we get a palindrome (321423303324123).

The spelling of 111212102112012 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred two million, one hundred twelve thousand, twelve".