12102131112 has 64 divisors (see below), whose sum is σ = 30781392960. Its totient is φ = 3964032000.

The previous prime is 12102131081. The next prime is 12102131177. The reversal of 12102131112 is 21113120121.

It is a junction number, because it is equal to n+sod(n) for n = 12102131091 and 12102131100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1754823 + ... + 1761705.

It is an arithmetic number, because the mean of its divisors is an integer number (480959265).

Almost surely, 2^12102131112 is an apocalyptic number.

12102131112 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 12102131112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15390696480).

12102131112 is an abundant number, since it is smaller than the sum of its proper divisors (18679261848).

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

12102131112 is a wasteful number, since it uses less digits than its factorization.

12102131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8154 (or 8150 counting only the distinct ones).

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

Adding to 12102131112 its reverse (21113120121), we get a palindrome (33215251233).

The spelling of 12102131112 in words is "twelve billion, one hundred two million, one hundred thirty-one thousand, one hundred twelve".