111111100011111 has 8 divisors (see below), whose sum is σ = 152152136952304. Its totient is φ = 72072064872000.

The previous prime is 111111100011089. The next prime is 111111100011137. The reversal of 111111100011111 is 111110001111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111111100011111 - 2¹⁹ = 111111099486823 is a prime.

It is a super-2 number, since 2×111111100011111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111100012111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500500450390 + ... + 500500450611.

It is an arithmetic number, because the mean of its divisors is an integer number (19019017119038).

Almost surely, 2^{111111100011111} is an apocalyptic number.

111111100011111 is a deficient number, since it is larger than the sum of its proper divisors (41041036941193).

111111100011111 is a wasteful number, since it uses less digits than its factorization.

111111100011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001000901041.

The product of its (nonzero) digits is 1, while the sum is 12.

Adding to 111111100011111 its reverse (111110001111111), we get a palindrome (222221101122222).

It can be divided in two parts, 11 and 1111100011111, that multiplied together give a palindrome (12222100122221).

The spelling of 111111100011111 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred million, eleven thousand, one hundred eleven".