111121778347 has 2 divisors, whose sum is σ = 111121778348. Its totient is φ = 111121778346.

The previous prime is 111121778267. The next prime is 111121778419. The reversal of 111121778347 is 743877121111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111121778347 is a prime.

It is not a weakly prime, because it can be changed into another prime (111221778347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560889173 + 55560889174.

It is an arithmetic number, because the mean of its divisors is an integer number (55560889174).

Almost surely, 2^111121778347 is an apocalyptic number.

111121778347 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121778347 is an equidigital number, since it uses as much as digits as its factorization.

111121778347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65856, while the sum is 43.

Adding to 111121778347 its reverse (743877121111), we get a palindrome (854998899458).

The spelling of 111121778347 in words is "one hundred eleven billion, one hundred twenty-one million, seven hundred seventy-eight thousand, three hundred forty-seven".