11123223231 has 8 divisors (see below), whose sum is σ = 14944178304. Its totient is φ = 7358875160.

The previous prime is 11123223217. The next prime is 11123223247. The reversal of 11123223231 is 13232232111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11123223231 - 2⁷ = 11123223103 is a prime.

It is a super-2 number, since 2×11123223231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11123223198 and 11123223207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123223281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14151291 + ... + 14152076.

It is an arithmetic number, because the mean of its divisors is an integer number (1868022288).

Almost surely, 2^11123223231 is an apocalyptic number.

11123223231 is a deficient number, since it is larger than the sum of its proper divisors (3820955073).

11123223231 is a wasteful number, since it uses less digits than its factorization.

11123223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28303501.

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

Adding to 11123223231 its reverse (13232232111), we get a palindrome (24355455342).

The spelling of 11123223231 in words is "eleven billion, one hundred twenty-three million, two hundred twenty-three thousand, two hundred thirty-one".