111123213311 has 16 divisors (see below), whose sum is σ = 126789608448. Its totient is φ = 96404589600.

The previous prime is 111123213301. The next prime is 111123213317. The reversal of 111123213311 is 113312321111.

It is a de Polignac number, because none of the positive numbers 2^k-111123213311 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 (111123213317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400496 + ... + 618581.

It is an arithmetic number, because the mean of its divisors is an integer number (7924350528).

Almost surely, 2^111123213311 is an apocalyptic number.

111123213311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111123213311 is a deficient number, since it is larger than the sum of its proper divisors (15666395137).

111123213311 is a wasteful number, since it uses less digits than its factorization.

111123213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019542.

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

Adding to 111123213311 its reverse (113312321111), we get a palindrome (224435534422).

The spelling of 111123213311 in words is "one hundred eleven billion, one hundred twenty-three million, two hundred thirteen thousand, three hundred eleven".