12031303212 has 18 divisors (see below), whose sum is σ = 30412460988. Its totient is φ = 4010434392.

The previous prime is 12031303211. The next prime is 12031303279. The reversal of 12031303212 is 21230313021.

12031303212 is a `hidden beast` number, since 120 + 31 + 303 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

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 (12031303211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 167101398 + ... + 167101469.

It is an arithmetic number, because the mean of its divisors is an integer number (1689581166).

Almost surely, 2^12031303212 is an apocalyptic number.

12031303212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12031303212 is an abundant number, since it is smaller than the sum of its proper divisors (18381157776).

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

12031303212 is a wasteful number, since it uses less digits than its factorization.

12031303212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334202877 (or 334202872 counting only the distinct ones).

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

Adding to 12031303212 its reverse (21230313021), we get a palindrome (33261616233).

The spelling of 12031303212 in words is "twelve billion, thirty-one million, three hundred three thousand, two hundred twelve".