1311121333 has 8 divisors (see below), whose sum is σ = 1317254400. Its totient is φ = 1304998128.

The previous prime is 1311121321. The next prime is 1311121387. The reversal of 1311121333 is 3331211131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311121333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311121333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311121303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424288 + ... + 427366.

It is an arithmetic number, because the mean of its divisors is an integer number (164656800).

Almost surely, 2^1311121333 is an apocalyptic number.

It is an amenable number.

1311121333 is a deficient number, since it is larger than the sum of its proper divisors (6133067).

1311121333 is a wasteful number, since it uses less digits than its factorization.

1311121333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4931.

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

The square root of 1311121333 is about 36209.4094538975. The cubic root of 1311121333 is about 1094.4962920295.

Adding to 1311121333 its reverse (3331211131), we get a palindrome (4642332464).

The spelling of 1311121333 in words is "one billion, three hundred eleven million, one hundred twenty-one thousand, three hundred thirty-three".