111213133212 has 96 divisors (see below), whose sum is σ = 274611617280. Its totient is φ = 34976032000.

The previous prime is 111213133211. The next prime is 111213133223. The reversal of 111213133212 is 212331312111.

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 (111213133211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4617433 + ... + 4641455.

It is an arithmetic number, because the mean of its divisors is an integer number (2860537680).

Almost surely, 2^111213133212 is an apocalyptic number.

111213133212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111213133212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137305808640).

111213133212 is an abundant number, since it is smaller than the sum of its proper divisors (163398484068).

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

111213133212 is a wasteful number, since it uses less digits than its factorization.

111213133212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24363 (or 24361 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

Adding to 111213133212 its reverse (212331312111), we get a palindrome (323544445323).

The spelling of 111213133212 in words is "one hundred eleven billion, two hundred thirteen million, one hundred thirty-three thousand, two hundred twelve".