11331223231 has 8 divisors (see below), whose sum is σ = 12003408144. Its totient is φ = 10659665280.

The previous prime is 11331223207. The next prime is 11331223243. The reversal of 11331223231 is 13232213311.

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 11331223231 - 2¹¹ = 11331221183 is a prime.

It is a super-2 number, since 2×11331223231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331223271) 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, 119265 + ... + 192058.

It is an arithmetic number, because the mean of its divisors is an integer number (1500426018).

Almost surely, 2^11331223231 is an apocalyptic number.

11331223231 is a deficient number, since it is larger than the sum of its proper divisors (672184913).

11331223231 is a wasteful number, since it uses less digits than its factorization.

11331223231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313481.

The product of its digits is 648, while the sum is 22.

Adding to 11331223231 its reverse (13232213311), we get a palindrome (24563436542).

The spelling of 11331223231 in words is "eleven billion, three hundred thirty-one million, two hundred twenty-three thousand, two hundred thirty-one".