12011011609 has 2 divisors, whose sum is σ = 12011011610. Its totient is φ = 12011011608.

The previous prime is 12011011591. The next prime is 12011011613. The reversal of 12011011609 is 90611011021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7250011609 + 4761000000 = 85147^2 + 69000^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011011609 - 2²³ = 12002623001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12011011609.

It is not a weakly prime, because it can be changed into another prime (12011011619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005505804 + 6005505805.

It is an arithmetic number, because the mean of its divisors is an integer number (6005505805).

Almost surely, 2^12011011609 is an apocalyptic number.

It is an amenable number.

12011011609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011011609 is an equidigital number, since it uses as much as digits as its factorization.

12011011609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 22.

The spelling of 12011011609 in words is "twelve billion, eleven million, eleven thousand, six hundred nine".