111100011156 has 54 divisors (see below), whose sum is σ = 291622781450. Its totient is φ = 37033328304.

The previous prime is 111100011149. The next prime is 111100011157. The reversal of 111100011156 is 651110001111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74247530256 + 36852480900 = 272484^2 + 191970^2 .

It is a tau number, because it is divible by the number of its divisors (54).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100011157) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2090431 + ... + 2142918.

Almost surely, 2^111100011156 is an apocalyptic number.

It is an amenable number.

111100011156 is an abundant number, since it is smaller than the sum of its proper divisors (180522770294).

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

111100011156 is an frugal number, since it uses more digits than its factorization.

111100011156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4233377 (or 4233354 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 18.

Adding to 111100011156 its reverse (651110001111), we get a palindrome (762210012267).

The spelling of 111100011156 in words is "one hundred eleven billion, one hundred million, eleven thousand, one hundred fifty-six".