12131121122233 has 4 divisors (see below), whose sum is σ = 12149698643748. Its totient is φ = 12112543600720.

The previous prime is 12131121122191. The next prime is 12131121122257. The reversal of 12131121122233 is 33222112113121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1958510683024 + 10172610439209 = 1399468^2 + 3189453^2 .

It is a cyclic number.

It is not a de Polignac number, because 12131121122233 - 2²⁵ = 12131087567801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12131121122198 and 12131121122207.

It is not an unprimeable number, because it can be changed into a prime (12131121122033) 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 3 ways as a sum of consecutive naturals, for example, 9288759778 + ... + 9288761083.

It is an arithmetic number, because the mean of its divisors is an integer number (3037424660937).

Almost surely, 2^{12131121122233} is an apocalyptic number.

It is an amenable number.

12131121122233 is a deficient number, since it is larger than the sum of its proper divisors (18577521515).

12131121122233 is an equidigital number, since it uses as much as digits as its factorization.

12131121122233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18577521514.

The product of its digits is 864, while the sum is 25.

Adding to 12131121122233 its reverse (33222112113121), we get a palindrome (45353233235354).

The spelling of 12131121122233 in words is "twelve trillion, one hundred thirty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred thirty-three".