111222445779 has 24 divisors (see below), whose sum is σ = 166735929360. Its totient is φ = 71358211008.

The previous prime is 111222445777. The next prime is 111222445783. The reversal of 111222445779 is 977544222111.

111222445779 is a `hidden beast` number, since 1 + 1 + 12 + 22 + 44 + 577 + 9 = 666.

It is not a de Polignac number, because 111222445779 - 2¹ = 111222445777 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (111222445777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 613912 + ... + 774165.

It is an arithmetic number, because the mean of its divisors is an integer number (6947330390).

Almost surely, 2^111222445779 is an apocalyptic number.

111222445779 is a deficient number, since it is larger than the sum of its proper divisors (55513483581).

111222445779 is a wasteful number, since it uses less digits than its factorization.

111222445779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388419 (or 1388416 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The spelling of 111222445779 in words is "one hundred eleven billion, two hundred twenty-two million, four hundred forty-five thousand, seven hundred seventy-nine".