111090911111 has 4 divisors (see below), whose sum is σ = 112190821224. Its totient is φ = 109991001000.

The previous prime is 111090911101. The next prime is 111090911221. The reversal of 111090911111 is 111119090111.

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 111090911111 - 2¹⁸ = 111090648967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111090911101) 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, 549954905 + ... + 549955106.

It is an arithmetic number, because the mean of its divisors is an integer number (28047705306).

Almost surely, 2^111090911111 is an apocalyptic number.

111090911111 is a deficient number, since it is larger than the sum of its proper divisors (1099910113).

111090911111 is a wasteful number, since it uses less digits than its factorization.

111090911111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099910112.

The product of its (nonzero) digits is 81, while the sum is 26.

It can be divided in two parts, 111090 and 911111, that added together give a palindrome (1022201).

The spelling of 111090911111 in words is "one hundred eleven billion, ninety million, nine hundred eleven thousand, one hundred eleven".