1123011231 has 4 divisors (see below), whose sum is σ = 1497348312. Its totient is φ = 748674152.

The previous prime is 1123011181. The next prime is 1123011233. The reversal of 1123011231 is 1321103211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1123011231 - 2¹¹ = 1123009183 is a prime.

It is a super-2 number, since 2×1123011231² = 2522308449904270722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123011231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123011233) 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 3 ways as a sum of consecutive naturals, for example, 187168536 + ... + 187168541.

It is an arithmetic number, because the mean of its divisors is an integer number (374337078).

Almost surely, 2^1123011231 is an apocalyptic number.

1123011231 is a deficient number, since it is larger than the sum of its proper divisors (374337081).

1123011231 is an equidigital number, since it uses as much as digits as its factorization.

1123011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374337080.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1123011231 is about 33511.3597306943. The cubic root of 1123011231 is about 1039.4286898524.

Adding to 1123011231 its reverse (1321103211), we get a palindrome (2444114442).

The spelling of 1123011231 in words is "one billion, one hundred twenty-three million, eleven thousand, two hundred thirty-one".