12193121249 has 2 divisors, whose sum is σ = 12193121250. Its totient is φ = 12193121248.

The previous prime is 12193121231. The next prime is 12193121263. The reversal of 12193121249 is 94212139121.

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., 9557017600 + 2636103649 = 97760^2 + 51343^2 .

It is a cyclic number.

It is not a de Polignac number, because 12193121249 - 2³² = 7898153953 is a prime.

It is not a weakly prime, because it can be changed into another prime (12193121849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6096560624 + 6096560625.

It is an arithmetic number, because the mean of its divisors is an integer number (6096560625).

Almost surely, 2^12193121249 is an apocalyptic number.

It is an amenable number.

12193121249 is a deficient number, since it is larger than the sum of its proper divisors (1).

12193121249 is an equidigital number, since it uses as much as digits as its factorization.

12193121249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The spelling of 12193121249 in words is "twelve billion, one hundred ninety-three million, one hundred twenty-one thousand, two hundred forty-nine".