12131332121 has 2 divisors, whose sum is σ = 12131332122. Its totient is φ = 12131332120.

The previous prime is 12131332079. The next prime is 12131332151. The reversal of 12131332121 is 12123313121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7397892121 + 4733440000 = 86011^2 + 68800^2 .

It is a cyclic number.

It is not a de Polignac number, because 12131332121 - 2²⁶ = 12064223257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12131332093 and 12131332102.

It is not a weakly prime, because it can be changed into another prime (12131332151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6065666060 + 6065666061.

It is an arithmetic number, because the mean of its divisors is an integer number (6065666061).

Almost surely, 2^12131332121 is an apocalyptic number.

It is an amenable number.

12131332121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131332121 is an equidigital number, since it uses as much as digits as its factorization.

12131332121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

Adding to 12131332121 its reverse (12123313121), we get a palindrome (24254645242).

The spelling of 12131332121 in words is "twelve billion, one hundred thirty-one million, three hundred thirty-two thousand, one hundred twenty-one".