1323213401 has 4 divisors (see below), whose sum is σ = 1323286692. Its totient is φ = 1323140112.

The previous prime is 1323213379. The next prime is 1323213407. The reversal of 1323213401 is 1043123231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1043123231 = 3797 ⋅274723.

It can be written as a sum of positive squares in 2 ways, for example, as 1237632400 + 85581001 = 35180^2 + 9251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323213401 - 2⁶ = 1323213337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1323213407) 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 3 ways as a sum of consecutive naturals, for example, 11675 + ... + 52751.

It is an arithmetic number, because the mean of its divisors is an integer number (330821673).

Almost surely, 2^1323213401 is an apocalyptic number.

It is an amenable number.

1323213401 is a deficient number, since it is larger than the sum of its proper divisors (73291).

1323213401 is an equidigital number, since it uses as much as digits as its factorization.

1323213401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73290.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1323213401 is about 36376.0003436332. Note that the first 3 decimals coincide. The cubic root of 1323213401 is about 1097.8507347389.

Adding to 1323213401 its reverse (1043123231), we get a palindrome (2366336632).

The spelling of 1323213401 in words is "one billion, three hundred twenty-three million, two hundred thirteen thousand, four hundred one".