12218169611 has 2 divisors, whose sum is σ = 12218169612. Its totient is φ = 12218169610.

The previous prime is 12218169599. The next prime is 12218169631. The reversal of 12218169611 is 11696181221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12218169611 is a prime.

It is not a weakly prime, because it can be changed into another prime (12218169631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6109084805 + 6109084806.

It is an arithmetic number, because the mean of its divisors is an integer number (6109084806).

Almost surely, 2^12218169611 is an apocalyptic number.

12218169611 is a deficient number, since it is larger than the sum of its proper divisors (1).

12218169611 is an equidigital number, since it uses as much as digits as its factorization.

12218169611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 38.

The spelling of 12218169611 in words is "twelve billion, two hundred eighteen million, one hundred sixty-nine thousand, six hundred eleven".