12218949511 has 2 divisors, whose sum is σ = 12218949512. Its totient is φ = 12218949510.

The previous prime is 12218949317. The next prime is 12218949521. The reversal of 12218949511 is 11594981221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12218949511 - 2¹¹ = 12218947463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12218949521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6109474755 + 6109474756.

It is an arithmetic number, because the mean of its divisors is an integer number (6109474756).

Almost surely, 2^12218949511 is an apocalyptic number.

12218949511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12218949511 is an equidigital number, since it uses as much as digits as its factorization.

12218949511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 43.

The spelling of 12218949511 in words is "twelve billion, two hundred eighteen million, nine hundred forty-nine thousand, five hundred eleven".