12031232145 has 16 divisors (see below), whose sum is σ = 19255180032. Its totient is φ = 6414920960.

The previous prime is 12031232141. The next prime is 12031232189. The reversal of 12031232145 is 54123213021.

It is not a de Polignac number, because 12031232145 - 2² = 12031232141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12031232141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50217 + ... + 163046.

It is an arithmetic number, because the mean of its divisors is an integer number (1203448752).

Almost surely, 2^12031232145 is an apocalyptic number.

12031232145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12031232145 is a deficient number, since it is larger than the sum of its proper divisors (7223947887).

12031232145 is a wasteful number, since it uses less digits than its factorization.

12031232145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217032.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 12031232145 its reverse (54123213021), we get a palindrome (66154445166).

The spelling of 12031232145 in words is "twelve billion, thirty-one million, two hundred thirty-two thousand, one hundred forty-five".