1111220085 has 16 divisors (see below), whose sum is σ = 1780848576. Its totient is φ = 591685248.

The previous prime is 1111220051. The next prime is 1111220087. The reversal of 1111220085 is 5800221111.

It is not a de Polignac number, because 1111220085 - 2⁶ = 1111220021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111220087) 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 15 ways as a sum of consecutive naturals, for example, 50779 + ... + 69288.

It is an arithmetic number, because the mean of its divisors is an integer number (111303036).

Almost surely, 2^1111220085 is an apocalyptic number.

1111220085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1111220085 is a deficient number, since it is larger than the sum of its proper divisors (669628491).

1111220085 is a wasteful number, since it uses less digits than its factorization.

1111220085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120692.

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 1111220085 is about 33334.9679015895. The cubic root of 1111220085 is about 1035.7780282654.

Adding to 1111220085 its reverse (5800221111), we get a palindrome (6911441196).

The spelling of 1111220085 in words is "one billion, one hundred eleven million, two hundred twenty thousand, eighty-five".