1323201213 has 12 divisors (see below), whose sum is σ = 1912403740. Its totient is φ = 881620416.

The previous prime is 1323201197. The next prime is 1323201223. The reversal of 1323201213 is 3121023231.

1323201213 is a `hidden beast` number, since 132 + 320 + 1 + 213 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 89927289 + 1233273924 = 9483^2 + 35118^2 .

It is not a de Polignac number, because 1323201213 - 2⁴ = 1323201197 is a prime.

It is a super-2 number, since 2×1323201213² = 3501722900169342738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323201223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26158 + ... + 57711.

Almost surely, 2^1323201213 is an apocalyptic number.

It is an amenable number.

1323201213 is a deficient number, since it is larger than the sum of its proper divisors (589202527).

1323201213 is a wasteful number, since it uses less digits than its factorization.

1323201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85628 (or 85625 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1323201213 is about 36375.8328152085. The cubic root of 1323201213 is about 1097.8473639937.

Adding to 1323201213 its reverse (3121023231), we get a palindrome (4444224444).

The spelling of 1323201213 in words is "one billion, three hundred twenty-three million, two hundred one thousand, two hundred thirteen".