1123231311 has 12 divisors (see below), whose sum is σ = 1666295592. Its totient is φ = 728582256.

The previous prime is 1123231297. The next prime is 1123231331. The reversal of 1123231311 is 1131323211.

1123231311 is a `hidden beast` number, since 1 + 123 + 231 + 311 = 666.

It is not a de Polignac number, because 1123231311 - 2¹⁴ = 1123214927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123231331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1686201 + ... + 1686866.

It is an arithmetic number, because the mean of its divisors is an integer number (138857966).

Almost surely, 2^1123231311 is an apocalyptic number.

1123231311 is a deficient number, since it is larger than the sum of its proper divisors (543064281).

1123231311 is a wasteful number, since it uses less digits than its factorization.

1123231311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373110 (or 3373107 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1123231311 is about 33514.6432324738. The cubic root of 1123231311 is about 1039.4965854406.

Adding to 1123231311 its reverse (1131323211), we get a palindrome (2254554522).

The spelling of 1123231311 in words is "one billion, one hundred twenty-three million, two hundred thirty-one thousand, three hundred eleven".