12081209957 has 2 divisors, whose sum is σ = 12081209958. Its totient is φ = 12081209956.

The previous prime is 12081209911. The next prime is 12081210013. The reversal of 12081209957 is 75990218021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7398408196 + 4682801761 = 86014^2 + 68431^2 .

It is a cyclic number.

It is not a de Polignac number, because 12081209957 - 2¹² = 12081205861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12081202957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6040604978 + 6040604979.

It is an arithmetic number, because the mean of its divisors is an integer number (6040604979).

Almost surely, 2^12081209957 is an apocalyptic number.

It is an amenable number.

12081209957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12081209957 is an equidigital number, since it uses as much as digits as its factorization.

12081209957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 44.

The spelling of 12081209957 in words is "twelve billion, eighty-one million, two hundred nine thousand, nine hundred fifty-seven".