1123133231 has 16 divisors (see below), whose sum is σ = 1240945056. Its totient is φ = 1008000000.

The previous prime is 1123133191. The next prime is 1123133233. The reversal of 1123133231 is 1323313211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123133231 is a prime.

It is a super-2 number, since 2×1123133231² = 2522856509152998722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123133233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444251 + ... + 446771.

It is an arithmetic number, because the mean of its divisors is an integer number (77559066).

Almost surely, 2^1123133231 is an apocalyptic number.

1123133231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123133231 is a deficient number, since it is larger than the sum of its proper divisors (117811825).

1123133231 is a wasteful number, since it uses less digits than its factorization.

1123133231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034.

The product of its digits is 324, while the sum is 20.

The square root of 1123133231 is about 33513.1799595323. The cubic root of 1123133231 is about 1039.4663284515.

Adding to 1123133231 its reverse (1323313211), we get a palindrome (2446446442).

The spelling of 1123133231 in words is "one billion, one hundred twenty-three million, one hundred thirty-three thousand, two hundred thirty-one".