111224555778 has 16 divisors (see below), whose sum is σ = 254227556160. Its totient is φ = 31778444496.

The previous prime is 111224555749. The next prime is 111224555779. The reversal of 111224555778 is 877555422111.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (111224555779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1324101813 + ... + 1324101896.

It is an arithmetic number, because the mean of its divisors is an integer number (15889222260).

Almost surely, 2^111224555778 is an apocalyptic number.

111224555778 is an abundant number, since it is smaller than the sum of its proper divisors (143003000382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111224555778 is a wasteful number, since it uses less digits than its factorization.

111224555778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648203721.

The product of its digits is 784000, while the sum is 48.

Adding to 111224555778 its reverse (877555422111), we get a palindrome (988779977889).

The spelling of 111224555778 in words is "one hundred eleven billion, two hundred twenty-four million, five hundred fifty-five thousand, seven hundred seventy-eight".