1133231311 has 4 divisors (see below), whose sum is σ = 1136441952. Its totient is φ = 1130020672.

The previous prime is 1133231303. The next prime is 1133231327. The reversal of 1133231311 is 1131323311.

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 1133231311 - 2³ = 1133231303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133291311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1604791 + ... + 1605496.

It is an arithmetic number, because the mean of its divisors is an integer number (284110488).

Almost surely, 2^1133231311 is an apocalyptic number.

1133231311 is a deficient number, since it is larger than the sum of its proper divisors (3210641).

1133231311 is an equidigital number, since it uses as much as digits as its factorization.

1133231311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210640.

The product of its digits is 162, while the sum is 19.

The square root of 1133231311 is about 33663.5011696645. The cubic root of 1133231311 is about 1042.5723155635.

Adding to 1133231311 its reverse (1131323311), we get a palindrome (2264554622).

The spelling of 1133231311 in words is "one billion, one hundred thirty-three million, two hundred thirty-one thousand, three hundred eleven".