12103203112 has 96 divisors (see below), whose sum is σ = 30700656000. Its totient is φ = 4352768640.

The previous prime is 12103203109. The next prime is 12103203127. The reversal of 12103203112 is 21130230121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19389 + ... + 156787.

It is an arithmetic number, because the mean of its divisors is an integer number (319798500).

Almost surely, 2^12103203112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12103203112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15350328000).

12103203112 is an abundant number, since it is smaller than the sum of its proper divisors (18597452888).

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

12103203112 is a wasteful number, since it uses less digits than its factorization.

12103203112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137447 (or 137432 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12103203112 its reverse (21130230121), we get a palindrome (33233433233).

The spelling of 12103203112 in words is "twelve billion, one hundred three million, two hundred three thousand, one hundred twelve".