1311123303 has 24 divisors (see below), whose sum is σ = 2258500608. Its totient is φ = 716638032.

The previous prime is 1311123301. The next prime is 1311123313. The reversal of 1311123303 is 3033211131.

It is a happy number.

It is not a de Polignac number, because 1311123303 - 2¹ = 1311123301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311123301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 450975 + ... + 453872.

It is an arithmetic number, because the mean of its divisors is an integer number (94104192).

Almost surely, 2^1311123303 is an apocalyptic number.

1311123303 is a deficient number, since it is larger than the sum of its proper divisors (947377305).

1311123303 is a wasteful number, since it uses less digits than its factorization.

1311123303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904883 (or 904880 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1311123303 is about 36209.4366567612. The cubic root of 1311123303 is about 1094.4968402006.

Adding to 1311123303 its reverse (3033211131), we get a palindrome (4344334434).

The spelling of 1311123303 in words is "one billion, three hundred eleven million, one hundred twenty-three thousand, three hundred three".