1323130221 has 80 divisors (see below), whose sum is σ = 2312095104. Its totient is φ = 738533376.

The previous prime is 1323130219. The next prime is 1323130241. The reversal of 1323130221 is 1220313231.

1323130221 is a `hidden beast` number, since 132 + 313 + 0 + 221 = 666.

It is not a de Polignac number, because 1323130221 - 2¹ = 1323130219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1323130194 and 1323130203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323130241) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6855501 + ... + 6855693.

Almost surely, 2^1323130221 is an apocalyptic number.

It is an amenable number.

1323130221 is a deficient number, since it is larger than the sum of its proper divisors (988964883).

1323130221 is a wasteful number, since it uses less digits than its factorization.

1323130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 423 counting only the distinct ones).

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

The square root of 1323130221 is about 36374.8569894096. The cubic root of 1323130221 is about 1097.8277298486.

Adding to 1323130221 its reverse (1220313231), we get a palindrome (2543443452).

The spelling of 1323130221 in words is "one billion, three hundred twenty-three million, one hundred thirty thousand, two hundred twenty-one".