1323123211 has 4 divisors (see below), whose sum is σ = 1333541632. Its totient is φ = 1312704792.

The previous prime is 1323123199. The next prime is 1323123251. The reversal of 1323123211 is 1123213231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1323123211 - 2¹³ = 1323115019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323123251) 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, 5209020 + ... + 5209273.

It is an arithmetic number, because the mean of its divisors is an integer number (333385408).

Almost surely, 2^1323123211 is an apocalyptic number.

1323123211 is a deficient number, since it is larger than the sum of its proper divisors (10418421).

1323123211 is a wasteful number, since it uses less digits than its factorization.

1323123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10418420.

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

The square root of 1323123211 is about 36374.7606315148. The cubic root of 1323123211 is about 1097.8257910659.

Adding to 1323123211 its reverse (1123213231), we get a palindrome (2446336442).

The spelling of 1323123211 in words is "one billion, three hundred twenty-three million, one hundred twenty-three thousand, two hundred eleven".