1323121333 has 4 divisors (see below), whose sum is σ = 1325323468. Its totient is φ = 1320919200.

The previous prime is 1323121321. The next prime is 1323121337. The reversal of 1323121333 is 3331213231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 730783089 + 592338244 = 27033^2 + 24338^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323121333 - 2¹⁷ = 1322990261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323121337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100166 + ... + 1101367.

It is an arithmetic number, because the mean of its divisors is an integer number (331330867).

Almost surely, 2^1323121333 is an apocalyptic number.

It is an amenable number.

1323121333 is a deficient number, since it is larger than the sum of its proper divisors (2202135).

1323121333 is an equidigital number, since it uses as much as digits as its factorization.

1323121333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202134.

The product of its digits is 972, while the sum is 22.

The square root of 1323121333 is about 36374.7348169028. The cubic root of 1323121333 is about 1097.8252716590.

Adding to 1323121333 its reverse (3331213231), we get a palindrome (4654334564).

The spelling of 1323121333 in words is "one billion, three hundred twenty-three million, one hundred twenty-one thousand, three hundred thirty-three".