1323123213 has 16 divisors (see below), whose sum is σ = 1776902400. Its totient is φ = 875730240.

The previous prime is 1323123199. The next prime is 1323123251. The reversal of 1323123213 is 3123213231.

It is not a de Polignac number, because 1323123213 - 2¹² = 1323119117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1323123213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323123913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388723 + ... + 392111.

It is an arithmetic number, because the mean of its divisors is an integer number (111056400).

Almost surely, 2^1323123213 is an apocalyptic number.

It is an amenable number.

1323123213 is a deficient number, since it is larger than the sum of its proper divisors (453779187).

1323123213 is a wasteful number, since it uses less digits than its factorization.

1323123213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292.

The product of its digits is 648, while the sum is 21.

The square root of 1323123213 is about 36374.7606590064. The cubic root of 1323123213 is about 1097.8257916190.

Adding to 1323123213 its reverse (3123213231), we get a palindrome (4446336444).

The spelling of 1323123213 in words is "one billion, three hundred twenty-three million, one hundred twenty-three thousand, two hundred thirteen".