1323123113 has 4 divisors (see below), whose sum is σ = 1424901828. Its totient is φ = 1221344400.

The previous prime is 1323123103. The next prime is 1323123133. The reversal of 1323123113 is 3113213231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 715402009 + 607721104 = 26747^2 + 24652^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323123113 - 2⁶ = 1323123049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1323123103) 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, 50889338 + ... + 50889363.

It is an arithmetic number, because the mean of its divisors is an integer number (356225457).

Almost surely, 2^1323123113 is an apocalyptic number.

1323123113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1323123113 is a deficient number, since it is larger than the sum of its proper divisors (101778715).

1323123113 is a wasteful number, since it uses less digits than its factorization.

1323123113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101778714.

The product of its digits is 324, while the sum is 20.

The square root of 1323123113 is about 36374.7592844269. The cubic root of 1323123113 is about 1097.8257639616.

Adding to 1323123113 its reverse (3113213231), we get a palindrome (4436336344).

The spelling of 1323123113 in words is "one billion, three hundred twenty-three million, one hundred twenty-three thousand, one hundred thirteen".