111100209988 has 36 divisors (see below), whose sum is σ = 197144278380. Its totient is φ = 54783827904.

The previous prime is 111100209923. The next prime is 111100209989. The reversal of 111100209988 is 889902001111.

It can be written as a sum of positive squares in 2 ways, for example, as 39884882944 + 71215327044 = 199712^2 + 266862^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111100209988.

It is not an unprimeable number, because it can be changed into a prime (111100209989) 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 11 ways as a sum of consecutive naturals, for example, 27683070 + ... + 27687082.

It is an arithmetic number, because the mean of its divisors is an integer number (5476229955).

Almost surely, 2^111100209988 is an apocalyptic number.

It is an amenable number.

111100209988 is a deficient number, since it is larger than the sum of its proper divisors (86044068392).

111100209988 is a wasteful number, since it uses less digits than its factorization.

111100209988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5284 (or 5203 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 40.

The spelling of 111100209988 in words is "one hundred eleven billion, one hundred million, two hundred nine thousand, nine hundred eighty-eight".