12111203112 has 32 divisors (see below), whose sum is σ = 30292627200. Its totient is φ = 4035118464.

The previous prime is 12111203063. The next prime is 12111203113. The reversal of 12111203112 is 21130211121.

It is a junction number, because it is equal to n+sod(n) for n = 12111203091 and 12111203100.

It is not an unprimeable number, because it can be changed into a prime (12111203113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70648 + ... + 170919.

It is an arithmetic number, because the mean of its divisors is an integer number (946644600).

Almost surely, 2^12111203112 is an apocalyptic number.

12111203112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111203112 is an abundant number, since it is smaller than the sum of its proper divisors (18181424088).

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

12111203112 is a wasteful number, since it uses less digits than its factorization.

12111203112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243665 (or 243661 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12111203112 its reverse (21130211121), we get a palindrome (33241414233).

The spelling of 12111203112 in words is "twelve billion, one hundred eleven million, two hundred three thousand, one hundred twelve".