11123232231 has 4 divisors (see below), whose sum is σ = 14830976312. Its totient is φ = 7415488152.

The previous prime is 11123232191. The next prime is 11123232247. The reversal of 11123232231 is 13223232111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11123232231 - 2¹⁵ = 11123199463 is a prime.

It is a super-2 number, since 2×11123232231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11123232198 and 11123232207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123232031) 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, 1853872036 + ... + 1853872041.

It is an arithmetic number, because the mean of its divisors is an integer number (3707744078).

Almost surely, 2^11123232231 is an apocalyptic number.

11123232231 is a deficient number, since it is larger than the sum of its proper divisors (3707744081).

11123232231 is an equidigital number, since it uses as much as digits as its factorization.

11123232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707744080.

The product of its digits is 432, while the sum is 21.

Adding to 11123232231 its reverse (13223232111), we get a palindrome (24346464342).

The spelling of 11123232231 in words is "eleven billion, one hundred twenty-three million, two hundred thirty-two thousand, two hundred thirty-one".