1323201601 has 2 divisors, whose sum is σ = 1323201602. Its totient is φ = 1323201600.

The previous prime is 1323201599. The next prime is 1323201611. The reversal of 1323201601 is 1061023231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 898800400 + 424401201 = 29980^2 + 20601^2 .

It is an emirp because it is prime and its reverse (1061023231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323201601 - 2¹ = 1323201599 is a prime.

Together with 1323201599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1323201611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661600800 + 661600801.

It is an arithmetic number, because the mean of its divisors is an integer number (661600801).

Almost surely, 2^1323201601 is an apocalyptic number.

It is an amenable number.

1323201601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323201601 is an equidigital number, since it uses as much as digits as its factorization.

1323201601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1323201601 is about 36375.8381484193. The cubic root of 1323201601 is about 1097.8474713003.

Adding to 1323201601 its reverse (1061023231), we get a palindrome (2384224832).

The spelling of 1323201601 in words is "one billion, three hundred twenty-three million, two hundred one thousand, six hundred one".