12131322012 has 18 divisors (see below), whose sum is σ = 30665286288. Its totient is φ = 4043773992.

The previous prime is 12131322001. The next prime is 12131322029. The reversal of 12131322012 is 21022313121.

12131322012 is a `hidden beast` number, since 121 + 313 + 220 + 12 = 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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168490548 + ... + 168490619.

It is an arithmetic number, because the mean of its divisors is an integer number (1703627016).

Almost surely, 2^12131322012 is an apocalyptic number.

12131322012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12131322012 is an abundant number, since it is smaller than the sum of its proper divisors (18533964276).

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

12131322012 is a wasteful number, since it uses less digits than its factorization.

12131322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336981177 (or 336981172 counting only the distinct ones).

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

Adding to 12131322012 its reverse (21022313121), we get a palindrome (33153635133).

The spelling of 12131322012 in words is "twelve billion, one hundred thirty-one million, three hundred twenty-two thousand, twelve".