11123343231 has 96 divisors (see below), whose sum is σ = 20097792000. Its totient is φ = 5313859200.

The previous prime is 11123343221. The next prime is 11123343241. The reversal of 11123343231 is 13234332111.

It is an interprime number because it is at equal distance from previous prime (11123343221) and next prime (11123343241).

It is not a de Polignac number, because 11123343231 - 2⁷ = 11123343103 is a prime.

It is a super-2 number, since 2×11123343231² (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 (11123343221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19480176 + ... + 19480746.

It is an arithmetic number, because the mean of its divisors is an integer number (209352000).

Almost surely, 2^11123343231 is an apocalyptic number.

11123343231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11123343231 is a deficient number, since it is larger than the sum of its proper divisors (8974448769).

11123343231 is a wasteful number, since it uses less digits than its factorization.

11123343231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117 (or 1104 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 11123343231 its reverse (13234332111), we get a palindrome (24357675342).

The spelling of 11123343231 in words is "eleven billion, one hundred twenty-three million, three hundred forty-three thousand, two hundred thirty-one".