11011112231 has 4 divisors (see below), whose sum is σ = 12584128272. Its totient is φ = 9438096192.

The previous prime is 11011112227. The next prime is 11011112251. The reversal of 11011112231 is 13221111011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13221111011 = 173 ⋅76422607.

It is not a de Polignac number, because 11011112231 - 2² = 11011112227 is a prime.

It is a super-2 number, since 2×11011112231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011112251) 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, 786508010 + ... + 786508023.

It is an arithmetic number, because the mean of its divisors is an integer number (3146032068).

Almost surely, 2^11011112231 is an apocalyptic number.

11011112231 is a deficient number, since it is larger than the sum of its proper divisors (1573016041).

11011112231 is an equidigital number, since it uses as much as digits as its factorization.

11011112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573016040.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11011112231 its reverse (13221111011), we get a palindrome (24232223242).

The spelling of 11011112231 in words is "eleven billion, eleven million, one hundred twelve thousand, two hundred thirty-one".