12123313 has 4 divisors (see below), whose sum is σ = 12259620. Its totient is φ = 11987008.

The previous prime is 12123299. The next prime is 12123317. The reversal of 12123313 is 31332121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31332121 = 19 ⋅1649059.

It can be written as a sum of positive squares in 2 ways, for example, as 6796449 + 5326864 = 2607^2 + 2308^2 .

It is a cyclic number.

It is not a de Polignac number, because 12123313 - 2²¹ = 10026161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12123317) 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, 68020 + ... + 68197.

It is an arithmetic number, because the mean of its divisors is an integer number (3064905).

Almost surely, 2^12123313 is an apocalyptic number.

It is an amenable number.

12123313 is a deficient number, since it is larger than the sum of its proper divisors (136307).

12123313 is an equidigital number, since it uses as much as digits as its factorization.

12123313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136306.

The product of its digits is 108, while the sum is 16.

The square root of 12123313 is about 3481.8548217868. The cubic root of 12123313 is about 229.7243894627.

Adding to 12123313 its reverse (31332121), we get a palindrome (43455434).

The spelling of 12123313 in words is "twelve million, one hundred twenty-three thousand, three hundred thirteen".