1123231011 has 16 divisors (see below), whose sum is σ = 1715556864. Its totient is φ = 640358784.

The previous prime is 1123231009. The next prime is 1123231027. The reversal of 1123231011 is 1101323211.

It is a happy number.

It is not a de Polignac number, because 1123231011 - 2¹ = 1123231009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123231211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52671 + ... + 70856.

It is an arithmetic number, because the mean of its divisors is an integer number (107222304).

Almost surely, 2^1123231011 is an apocalyptic number.

1123231011 is a deficient number, since it is larger than the sum of its proper divisors (592325853).

1123231011 is a wasteful number, since it uses less digits than its factorization.

1123231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123970.

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

The square root of 1123231011 is about 33514.6387568179. The cubic root of 1123231011 is about 1039.4964928954.

Adding to 1123231011 its reverse (1101323211), we get a palindrome (2224554222).

The spelling of 1123231011 in words is "one billion, one hundred twenty-three million, two hundred thirty-one thousand, eleven".