12013131331212 has 24 divisors (see below), whose sum is σ = 30578879752512. Its totient is φ = 3640342827600.

The previous prime is 12013131331211. The next prime is 12013131331291. The reversal of 12013131331212 is 21213313131021.

It is not an unprimeable number, because it can be changed into a prime (12013131331211) 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 7 ways as a sum of consecutive naturals, for example, 45504285214 + ... + 45504285477.

It is an arithmetic number, because the mean of its divisors is an integer number (1274119989688).

Almost surely, 2^{12013131331212} is an apocalyptic number.

12013131331212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12013131331212 is an abundant number, since it is smaller than the sum of its proper divisors (18565748421300).

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

12013131331212 is a wasteful number, since it uses less digits than its factorization.

12013131331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91008570709 (or 91008570707 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 12013131331212 its reverse (21213313131021), we get a palindrome (33226444462233).

The spelling of 12013131331212 in words is "twelve trillion, thirteen billion, one hundred thirty-one million, three hundred thirty-one thousand, two hundred twelve".