111222201210689 has 2 divisors, whose sum is σ = 111222201210690. Its totient is φ = 111222201210688.

The previous prime is 111222201210641. The next prime is 111222201210691. The reversal of 111222201210689 is 986012102222111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80929671272464 + 30292529938225 = 8996092^2 + 5503865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111222201210689 is a prime.

Together with 111222201210691, 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 (111222201110689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611100605344 + 55611100605345.

It is an arithmetic number, because the mean of its divisors is an integer number (55611100605345).

Almost surely, 2^{111222201210689} is an apocalyptic number.

It is an amenable number.

111222201210689 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222201210689 is an equidigital number, since it uses as much as digits as its factorization.

111222201210689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The spelling of 111222201210689 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred one million, two hundred ten thousand, six hundred eighty-nine".