12012203112 has 128 divisors (see below), whose sum is σ = 37067708160. Its totient is φ = 3158876160.

The previous prime is 12012203107. The next prime is 12012203141. The reversal of 12012203112 is 21130221021.

It is a junction number, because it is equal to n+sod(n) for n = 12012203091 and 12012203100.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 763162 + ... + 778742.

It is an arithmetic number, because the mean of its divisors is an integer number (289591470).

Almost surely, 2^12012203112 is an apocalyptic number.

12012203112 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 12012203112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18533854080).

12012203112 is an abundant number, since it is smaller than the sum of its proper divisors (25055505048).

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

12012203112 is a wasteful number, since it uses less digits than its factorization.

12012203112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15963 (or 15959 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12012203112 its reverse (21130221021), we get a palindrome (33142424133).

The spelling of 12012203112 in words is "twelve billion, twelve million, two hundred three thousand, one hundred twelve".