12031321302 has 192 divisors, whose sum is σ = 35948150784. Its totient is φ = 2806513920.

The previous prime is 12031321297. The next prime is 12031321307. The reversal of 12031321302 is 20312313021.

12031321302 is a `hidden beast` number, since 12 + 0 + 31 + 321 + 302 = 666.

It is an interprime number because it is at equal distance from previous prime (12031321297) and next prime (12031321307).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031321307) 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 95 ways as a sum of consecutive naturals, for example, 657643 + ... + 675689.

It is an arithmetic number, because the mean of its divisors is an integer number (187229952).

Almost surely, 2^12031321302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12031321302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17974075392).

12031321302 is an abundant number, since it is smaller than the sum of its proper divisors (23916829482).

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

12031321302 is a wasteful number, since it uses less digits than its factorization.

12031321302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18123 (or 18120 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12031321302 its reverse (20312313021), we get a palindrome (32343634323).

It can be divided in two parts, 12031 and 321302, that added together give a palindrome (333333).

The spelling of 12031321302 in words is "twelve billion, thirty-one million, three hundred twenty-one thousand, three hundred two".