12131221213133 has 32 divisors (see below), whose sum is σ = 14589907660800. Its totient is φ = 9956805249600.

The previous prime is 12131221213091. The next prime is 12131221213183. The reversal of 12131221213133 is 33131212213121.

It is a de Polignac number, because none of the positive numbers 2^k-12131221213133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131221213183) 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 31 ways as a sum of consecutive naturals, for example, 3353498 + ... + 5958891.

It is an arithmetic number, because the mean of its divisors is an integer number (455934614400).

Almost surely, 2^{12131221213133} is an apocalyptic number.

It is an amenable number.

12131221213133 is a deficient number, since it is larger than the sum of its proper divisors (2458686447667).

12131221213133 is a wasteful number, since it uses less digits than its factorization.

12131221213133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9312713.

The product of its digits is 1296, while the sum is 26.

Adding to 12131221213133 its reverse (33131212213121), we get a palindrome (45262433426254).

The spelling of 12131221213133 in words is "twelve trillion, one hundred thirty-one billion, two hundred twenty-one million, two hundred thirteen thousand, one hundred thirty-three".