1321133333 has 24 divisors (see below), whose sum is σ = 1475641728. Its totient is φ = 1181561472.

The previous prime is 1321133273. The next prime is 1321133371. The reversal of 1321133333 is 3333311231.

It is a de Polignac number, because none of the positive numbers 2^k-1321133333 is a prime.

It is a Duffinian number.

1321133333 is a modest number, since divided by 33333 gives 13211 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1321133299 and 1321133308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321132333) 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, 994916 + ... + 996242.

It is an arithmetic number, because the mean of its divisors is an integer number (61485072).

Almost surely, 2^1321133333 is an apocalyptic number.

1321133333 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1321133333 is a deficient number, since it is larger than the sum of its proper divisors (154508395).

1321133333 is a wasteful number, since it uses less digits than its factorization.

1321133333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1520 counting only the distinct ones).

The product of its digits is 1458, while the sum is 23.

The square root of 1321133333 is about 36347.3978848555. The cubic root of 1321133333 is about 1097.2751657436.

Adding to 1321133333 its reverse (3333311231), we get a palindrome (4654444564).

The spelling of 1321133333 in words is "one billion, three hundred twenty-one million, one hundred thirty-three thousand, three hundred thirty-three".