12154331112 has 128 divisors (see below), whose sum is σ = 38259302400. Its totient is φ = 3125664000.

The previous prime is 12154331099. The next prime is 12154331129. The reversal of 12154331112 is 21113345121.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 31 ways as a sum of consecutive naturals, for example, 154089 + ... + 219207.

It is an arithmetic number, because the mean of its divisors is an integer number (298900800).

Almost surely, 2^12154331112 is an apocalyptic number.

12154331112 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 12154331112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19129651200).

12154331112 is an abundant number, since it is smaller than the sum of its proper divisors (26104971288).

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

12154331112 is a wasteful number, since it uses less digits than its factorization.

12154331112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65247 (or 65243 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

Adding to 12154331112 its reverse (21113345121), we get a palindrome (33267676233).

The spelling of 12154331112 in words is "twelve billion, one hundred fifty-four million, three hundred thirty-one thousand, one hundred twelve".