111200111111 has 4 divisors (see below), whose sum is σ = 111201159552. Its totient is φ = 111199062672.

The previous prime is 111200111107. The next prime is 111200111149. The reversal of 111200111111 is 111111002111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111200111111 - 2² = 111200111107 is a prime.

It is a super-2 number, since 2×111200111111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111200111092 and 111200111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111200141111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344615 + ... + 584088.

It is an arithmetic number, because the mean of its divisors is an integer number (27800289888).

Almost surely, 2^111200111111 is an apocalyptic number.

111200111111 is a deficient number, since it is larger than the sum of its proper divisors (1048441).

111200111111 is an equidigital number, since it uses as much as digits as its factorization.

111200111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048440.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111200111111 its reverse (111111002111), we get a palindrome (222311113222).

The spelling of 111200111111 in words is "one hundred eleven billion, two hundred million, one hundred eleven thousand, one hundred eleven".