111122788 has 36 divisors (see below), whose sum is σ = 227066112. Its totient is φ = 47444880.

The previous prime is 111122779. The next prime is 111122813. The reversal of 111122788 is 887221111.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60045 + ... + 61867.

It is an arithmetic number, because the mean of its divisors is an integer number (6307392).

Almost surely, 2^111122788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111122788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113533056).

111122788 is an abundant number, since it is smaller than the sum of its proper divisors (115943324).

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

111122788 is a wasteful number, since it uses less digits than its factorization.

111122788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152 (or 2143 counting only the distinct ones).

The product of its digits is 1792, while the sum is 31.

The square root of 111122788 is about 10541.4794028163. The cubic root of 111122788 is about 480.7666971672.

Adding to 111122788 its reverse (887221111), we get a palindrome (998343899).

It can be divided in two parts, 11112 and 2788, that multiplied together give a triangular number (30980256 = T₇₈₇₁).

The spelling of 111122788 in words is "one hundred eleven million, one hundred twenty-two thousand, seven hundred eighty-eight".