111244220777 has 4 divisors (see below), whose sum is σ = 115080228420. Its totient is φ = 107408213136.

The previous prime is 111244220761. The next prime is 111244220779. The reversal of 111244220777 is 777022442111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 777022442111 = 1091 ⋅712211221.

It can be written as a sum of positive squares in 2 ways, for example, as 67400467456 + 43843753321 = 259616^2 + 209389^2 .

It is a cyclic number.

It is not a de Polignac number, because 111244220777 - 2⁴ = 111244220761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111244220777.

It is not an unprimeable number, because it can be changed into a prime (111244220779) 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 in 3 ways as a sum of consecutive naturals, for example, 1918003778 + ... + 1918003835.

It is an arithmetic number, because the mean of its divisors is an integer number (28770057105).

Almost surely, 2^111244220777 is an apocalyptic number.

It is an amenable number.

111244220777 is a deficient number, since it is larger than the sum of its proper divisors (3836007643).

111244220777 is an equidigital number, since it uses as much as digits as its factorization.

111244220777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836007642.

The product of its (nonzero) digits is 43904, while the sum is 38.

Adding to 111244220777 its reverse (777022442111), we get a palindrome (888266662888).

The spelling of 111244220777 in words is "one hundred eleven billion, two hundred forty-four million, two hundred twenty thousand, seven hundred seventy-seven".