11123122231 has 16 divisors (see below), whose sum is σ = 12412280160. Its totient is φ = 9897068160.

The previous prime is 11123122217. The next prime is 11123122247. The reversal of 11123122231 is 13222132111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123122231 is a prime.

It is a super-2 number, since 2×11123122231² (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 = 11123122199 and 11123122208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123122261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207036 + ... + 255166.

It is an arithmetic number, because the mean of its divisors is an integer number (775767510).

Almost surely, 2^11123122231 is an apocalyptic number.

11123122231 is a deficient number, since it is larger than the sum of its proper divisors (1289157929).

11123122231 is a wasteful number, since it uses less digits than its factorization.

11123122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48786.

The product of its digits is 144, while the sum is 19.

Adding to 11123122231 its reverse (13222132111), we get a palindrome (24345254342).

The spelling of 11123122231 in words is "eleven billion, one hundred twenty-three million, one hundred twenty-two thousand, two hundred thirty-one".