1212104666579 has 2 divisors, whose sum is σ = 1212104666580. Its totient is φ = 1212104666578.

The previous prime is 1212104666561. The next prime is 1212104666581. The reversal of 1212104666579 is 9756664012121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212104666579 - 2²⁰ = 1212103618003 is a prime.

It is a Sophie Germain prime.

Together with 1212104666581, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1212104666519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606052333289 + 606052333290.

It is an arithmetic number, because the mean of its divisors is an integer number (606052333290).

Almost surely, 2^{1212104666579} is an apocalyptic number.

1212104666579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212104666579 is an equidigital number, since it uses as much as digits as its factorization.

1212104666579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 1212104666579 in words is "one trillion, two hundred twelve billion, one hundred four million, six hundred sixty-six thousand, five hundred seventy-nine".