1311321033 has 48 divisors (see below), whose sum is σ = 2131613952. Its totient is φ = 769824000.

The previous prime is 1311321031. The next prime is 1311321041. The reversal of 1311321033 is 3301231131.

It is a happy number.

1311321033 is a `hidden beast` number, since 1 + 311 + 321 + 0 + 33 = 666.

It is not a de Polignac number, because 1311321033 - 2¹ = 1311321031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311320997 and 1311321015.

It is not an unprimeable number, because it can be changed into a prime (1311321031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 992013 + ... + 993333.

It is an arithmetic number, because the mean of its divisors is an integer number (44408624).

Almost surely, 2^1311321033 is an apocalyptic number.

It is an amenable number.

1311321033 is a deficient number, since it is larger than the sum of its proper divisors (820292919).

1311321033 is a wasteful number, since it uses less digits than its factorization.

1311321033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1643 counting only the distinct ones).

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

The square root of 1311321033 is about 36212.1669194209. The cubic root of 1311321033 is about 1094.5518576505.

Adding to 1311321033 its reverse (3301231131), we get a palindrome (4612552164).

The spelling of 1311321033 in words is "one billion, three hundred eleven million, three hundred twenty-one thousand, thirty-three".