111200111111111 has 4 divisors (see below), whose sum is σ = 121309212121224. Its totient is φ = 101091010101000.

The previous prime is 111200111111093. The next prime is 111200111111147. The reversal of 111200111111111 is 111111111002111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111200111111111 - 2²² = 111200106916807 is a prime.

It is a super-2 number, since 2×111200111111111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

111200111111111 is a modest number, since divided by 11111111 gives 1112001 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111200111111611) 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, 5054550505040 + ... + 5054550505061.

It is an arithmetic number, because the mean of its divisors is an integer number (30327303030306).

Almost surely, 2^{111200111111111} is an apocalyptic number.

111200111111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111200111111111 is a deficient number, since it is larger than the sum of its proper divisors (10109101010113).

111200111111111 is a wasteful number, since it uses less digits than its factorization.

111200111111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10109101010112.

The product of its (nonzero) digits is 2, while the sum is 14.

Adding to 111200111111111 its reverse (111111111002111), we get a palindrome (222311222113222).

The spelling of 111200111111111 in words is "one hundred eleven trillion, two hundred billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".