1323134221 has 4 divisors (see below), whose sum is σ = 1323207712. Its totient is φ = 1323060732.

The previous prime is 1323134167. The next prime is 1323134231. The reversal of 1323134221 is 1224313231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1224313231 = 271 ⋅4517761.

It is a cyclic number.

It is not a de Polignac number, because 1323134221 - 2⁷ = 1323134093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323134192 and 1323134201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323134231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10570 + ... + 52516.

It is an arithmetic number, because the mean of its divisors is an integer number (330801928).

Almost surely, 2^1323134221 is an apocalyptic number.

It is an amenable number.

1323134221 is a deficient number, since it is larger than the sum of its proper divisors (73491).

1323134221 is an equidigital number, since it uses as much as digits as its factorization.

1323134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73490.

The product of its digits is 864, while the sum is 22.

The square root of 1323134221 is about 36374.9119724021. The cubic root of 1323134221 is about 1097.8288361409.

Adding to 1323134221 its reverse (1224313231), we get a palindrome (2547447452).

The spelling of 1323134221 in words is "one billion, three hundred twenty-three million, one hundred thirty-four thousand, two hundred twenty-one".