1323232121 has 4 divisors (see below), whose sum is σ = 1323307392. Its totient is φ = 1323156852.

The previous prime is 1323232087. The next prime is 1323232123. The reversal of 1323232121 is 1212323231.

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.

It is a cyclic number.

It is not a de Polignac number, because 1323232121 - 2¹⁰ = 1323231097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323232093 and 1323232102.

It is not an unprimeable number, because it can be changed into a prime (1323232123) 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, 4340 + ... + 51626.

It is an arithmetic number, because the mean of its divisors is an integer number (330826848).

Almost surely, 2^1323232121 is an apocalyptic number.

It is an amenable number.

1323232121 is a deficient number, since it is larger than the sum of its proper divisors (75271).

1323232121 is an equidigital number, since it uses as much as digits as its factorization.

1323232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75270.

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

The square root of 1323232121 is about 36376.2576552344. The cubic root of 1323232121 is about 1097.8559119509.

Adding to 1323232121 its reverse (1212323231), we get a palindrome (2535555352).

The spelling of 1323232121 in words is "one billion, three hundred twenty-three million, two hundred thirty-two thousand, one hundred twenty-one".