12091208957 has 2 divisors, whose sum is σ = 12091208958. Its totient is φ = 12091208956.

The previous prime is 12091208953. The next prime is 12091208963. The reversal of 12091208957 is 75980219021.

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., 10797080281 + 1294128676 = 103909^2 + 35974^2 .

It is a cyclic number.

It is not a de Polignac number, because 12091208957 - 2² = 12091208953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12091208953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6045604478 + 6045604479.

It is an arithmetic number, because the mean of its divisors is an integer number (6045604479).

Almost surely, 2^12091208957 is an apocalyptic number.

It is an amenable number.

12091208957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12091208957 is an equidigital number, since it uses as much as digits as its factorization.

12091208957 is an evil number, because the sum of its binary digits is even.

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

The spelling of 12091208957 in words is "twelve billion, ninety-one million, two hundred eight thousand, nine hundred fifty-seven".