111121323311 has 4 divisors (see below), whose sum is σ = 111148717392. Its totient is φ = 111093929232.

The previous prime is 111121323277. The next prime is 111121323323. The reversal of 111121323311 is 113323121111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113323121111 = 116981 ⋅968731.

It is a cyclic number.

It is not a de Polignac number, because 111121323311 - 2¹⁴ = 111121306927 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 (111121323371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13690955 + ... + 13699068.

It is an arithmetic number, because the mean of its divisors is an integer number (27787179348).

Almost surely, 2^111121323311 is an apocalyptic number.

111121323311 is a deficient number, since it is larger than the sum of its proper divisors (27394081).

111121323311 is an equidigital number, since it uses as much as digits as its factorization.

111121323311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27394080.

The product of its digits is 108, while the sum is 20.

Adding to 111121323311 its reverse (113323121111), we get a palindrome (224444444422).

The spelling of 111121323311 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred eleven".