111212100120012 has 48 divisors (see below), whose sum is σ = 266515432753920. Its totient is φ = 36067820640192.

The previous prime is 111212100120007. The next prime is 111212100120019. The reversal of 111212100120012 is 210021001212111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111212100119973 and 111212100120000.

It is not an unprimeable number, because it can be changed into a prime (111212100120019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13282039 + ... + 19970897.

It is an arithmetic number, because the mean of its divisors is an integer number (5552404849040).

Almost surely, 2^{111212100120012} is an apocalyptic number.

111212100120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111212100120012 is an abundant number, since it is smaller than the sum of its proper divisors (155303332633908).

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

111212100120012 is a wasteful number, since it uses less digits than its factorization.

111212100120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6726350 (or 6726348 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111212100120012 its reverse (210021001212111), we get a palindrome (321233101332123).

The spelling of 111212100120012 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred million, one hundred twenty thousand, twelve".