12312012132 has 36 divisors (see below), whose sum is σ = 35568035776. Its totient is φ = 3517717680.

The previous prime is 12312012131. The next prime is 12312012143. The reversal of 12312012132 is 23121021321.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12312012131) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 24428344 + ... + 24428847.

Almost surely, 2^12312012132 is an apocalyptic number.

12312012132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12312012132 is an abundant number, since it is smaller than the sum of its proper divisors (23256023644).

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

12312012132 is a wasteful number, since it uses less digits than its factorization.

12312012132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48857208 (or 48857203 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12312012132 its reverse (23121021321), we get a palindrome (35433033453).

The spelling of 12312012132 in words is "twelve billion, three hundred twelve million, twelve thousand, one hundred thirty-two".