12091209079 has 2 divisors, whose sum is σ = 12091209080. Its totient is φ = 12091209078.

The previous prime is 12091209061. The next prime is 12091209107. The reversal of 12091209079 is 97090219021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12091209079 - 2¹⁵ = 12091176311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12091209019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6045604539 + 6045604540.

It is an arithmetic number, because the mean of its divisors is an integer number (6045604540).

Almost surely, 2^12091209079 is an apocalyptic number.

12091209079 is a deficient number, since it is larger than the sum of its proper divisors (1).

12091209079 is an equidigital number, since it uses as much as digits as its factorization.

12091209079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 40.

The spelling of 12091209079 in words is "twelve billion, ninety-one million, two hundred nine thousand, seventy-nine".