12122122220111 has 2 divisors, whose sum is σ = 12122122220112. Its totient is φ = 12122122220110.

The previous prime is 12122122220093. The next prime is 12122122220161. The reversal of 12122122220111 is 11102222122121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12122122220111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122122220161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061061110055 + 6061061110056.

It is an arithmetic number, because the mean of its divisors is an integer number (6061061110056).

Almost surely, 2^{12122122220111} is an apocalyptic number.

12122122220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122122220111 is an equidigital number, since it uses as much as digits as its factorization.

12122122220111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12122122220111 its reverse (11102222122121), we get a palindrome (23224344342232).

The spelling of 12122122220111 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-two million, two hundred twenty thousand, one hundred eleven".