1131233011 has 4 divisors (see below), whose sum is σ = 1131303024. Its totient is φ = 1131163000.

The previous prime is 1131232969. The next prime is 1131233017. The reversal of 1131233011 is 1103321311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1131233011 - 2¹³ = 1131224819 is a prime.

It is a super-2 number, since 2×1131233011² = 2559376250352252242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131233017) 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, 2946 + ... + 47656.

It is an arithmetic number, because the mean of its divisors is an integer number (282825756).

Almost surely, 2^1131233011 is an apocalyptic number.

1131233011 is a deficient number, since it is larger than the sum of its proper divisors (70013).

1131233011 is an equidigital number, since it uses as much as digits as its factorization.

1131233011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70012.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1131233011 is about 33633.8075602510. The cubic root of 1131233011 is about 1041.9591432951.

Adding to 1131233011 its reverse (1103321311), we get a palindrome (2234554322).

The spelling of 1131233011 in words is "one billion, one hundred thirty-one million, two hundred thirty-three thousand, eleven".