12031323252 has 48 divisors (see below), whose sum is σ = 30239748672. Its totient is φ = 3701064960.

The previous prime is 12031323251. The next prime is 12031323281. The reversal of 12031323252 is 25232313021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031323251) 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 15 ways as a sum of consecutive naturals, for example, 1011363 + ... + 1023189.

It is an arithmetic number, because the mean of its divisors is an integer number (629994764).

Almost surely, 2^12031323252 is an apocalyptic number.

12031323252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12031323252 is an abundant number, since it is smaller than the sum of its proper divisors (18208425420).

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

12031323252 is a wasteful number, since it uses less digits than its factorization.

12031323252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18368 (or 18366 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 12031323252 its reverse (25232313021), we get a palindrome (37263636273).

The spelling of 12031323252 in words is "twelve billion, thirty-one million, three hundred twenty-three thousand, two hundred fifty-two".