111543532111 has 12 divisors (see below), whose sum is σ = 121895646120. Its totient is φ = 101227022960.

The previous prime is 111543532019. The next prime is 111543532117. The reversal of 111543532111 is 111235345111.

It is a happy number.

It is not a de Polignac number, because 111543532111 - 2¹⁵ = 111543499343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111543532111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111543532117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3775545 + ... + 3804973.

It is an arithmetic number, because the mean of its divisors is an integer number (10157970510).

Almost surely, 2^111543532111 is an apocalyptic number.

111543532111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111543532111 is a deficient number, since it is larger than the sum of its proper divisors (10352114009).

111543532111 is an frugal number, since it uses more digits than its factorization.

111543532111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30614 (or 30027 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

Adding to 111543532111 its reverse (111235345111), we get a palindrome (222778877222).

The spelling of 111543532111 in words is "one hundred eleven billion, five hundred forty-three million, five hundred thirty-two thousand, one hundred eleven".