111012133212 has 36 divisors (see below), whose sum is σ = 284566319856. Its totient is φ = 36482859840.

The previous prime is 111012133159. The next prime is 111012133217. The reversal of 111012133212 is 212331210111.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012133217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21713433 + ... + 21718544.

It is an arithmetic number, because the mean of its divisors is an integer number (7904619996).

Almost surely, 2^111012133212 is an apocalyptic number.

111012133212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111012133212 is an abundant number, since it is smaller than the sum of its proper divisors (173554186644).

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

111012133212 is a wasteful number, since it uses less digits than its factorization.

111012133212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43432058 (or 43432053 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111012133212 its reverse (212331210111), we get a palindrome (323343343323).

The spelling of 111012133212 in words is "one hundred eleven billion, twelve million, one hundred thirty-three thousand, two hundred twelve".