1311333121 has 8 divisors (see below), whose sum is σ = 1499503104. Its totient is φ = 1123372320.

The previous prime is 1311333119. The next prime is 1311333143. The reversal of 1311333121 is 1213331131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311333121 - 2¹ = 1311333119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311333161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38620 + ... + 64141.

It is an arithmetic number, because the mean of its divisors is an integer number (187437888).

Almost surely, 2^1311333121 is an apocalyptic number.

It is an amenable number.

1311333121 is a deficient number, since it is larger than the sum of its proper divisors (188169983).

1311333121 is a wasteful number, since it uses less digits than its factorization.

1311333121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104591.

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

The square root of 1311333121 is about 36212.3338242649. Note that the first 3 decimals coincide. The cubic root of 1311333121 is about 1094.5552209007. Note that the first 3 decimals are identical.

Adding to 1311333121 its reverse (1213331131), we get a palindrome (2524664252).

The spelling of 1311333121 in words is "one billion, three hundred eleven million, three hundred thirty-three thousand, one hundred twenty-one".