12331121985 has 48 divisors (see below), whose sum is σ = 26306402304. Its totient is φ = 5203460736.

The previous prime is 12331121981. The next prime is 12331122007. The reversal of 12331121985 is 58912113321.

12331121985 is a `hidden beast` number, since 123 + 311 + 219 + 8 + 5 = 666.

It is not a de Polignac number, because 12331121985 - 2² = 12331121981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12331121981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1501537 + ... + 1509726.

It is an arithmetic number, because the mean of its divisors is an integer number (548050048).

Almost surely, 2^12331121985 is an apocalyptic number.

12331121985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12331121985 is an abundant number, since it is smaller than the sum of its proper divisors (13975280319).

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

12331121985 is a wasteful number, since it uses less digits than its factorization.

12331121985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011294 (or 3011291 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The spelling of 12331121985 in words is "twelve billion, three hundred thirty-one million, one hundred twenty-one thousand, nine hundred eighty-five".