12111235212 has 48 divisors (see below), whose sum is σ = 29600524800. Its totient is φ = 3846847488.

The previous prime is 12111235177. The next prime is 12111235223. The reversal of 12111235212 is 21253211121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10837 + ... + 156012.

It is an arithmetic number, because the mean of its divisors is an integer number (616677600).

Almost surely, 2^12111235212 is an apocalyptic number.

12111235212 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 12111235212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14800262400).

12111235212 is an abundant number, since it is smaller than the sum of its proper divisors (17489289588).

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

12111235212 is a wasteful number, since it uses less digits than its factorization.

12111235212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167142 (or 167140 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

Adding to 12111235212 its reverse (21253211121), we get a palindrome (33364446333).

The spelling of 12111235212 in words is "twelve billion, one hundred eleven million, two hundred thirty-five thousand, two hundred twelve".