111100000111172 has 12 divisors (see below), whose sum is σ = 194719137869676. Its totient is φ = 55465960719840.

The previous prime is 111100000111171. The next prime is 111100000111183. The reversal of 111100000111172 is 271111000001111.

It can be written as a sum of positive squares in 2 ways, for example, as 42337196943616 + 68762803167556 = 6506704^2 + 8292334^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111100000111172.

It is not an unprimeable number, because it can be changed into a prime (111100000111171) 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, 21009830963 + ... + 21009836250.

It is an arithmetic number, because the mean of its divisors is an integer number (16226594822473).

Almost surely, 2^{111100000111172} is an apocalyptic number.

It is an amenable number.

111100000111172 is a deficient number, since it is larger than the sum of its proper divisors (83619137758504).

111100000111172 is a wasteful number, since it uses less digits than its factorization.

111100000111172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42019667878 (or 42019667876 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 17.

Adding to 111100000111172 its reverse (271111000001111), we get a palindrome (382211000112283).

The spelling of 111100000111172 in words is "one hundred eleven trillion, one hundred billion, one hundred eleven thousand, one hundred seventy-two".