123304040213 has 4 divisors (see below), whose sum is σ = 129793726560. Its totient is φ = 116814353868.

The previous prime is 123304040191. The next prime is 123304040219. The reversal of 123304040213 is 312040403321.

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 an emirpimes, since its reverse is a distinct semiprime: 312040403321 = 49871 ⋅6256951.

It is a cyclic number.

It is not a de Polignac number, because 123304040213 - 2¹² = 123304036117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123304040219) 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, 3244843145 + ... + 3244843182.

It is an arithmetic number, because the mean of its divisors is an integer number (32448431640).

Almost surely, 2^123304040213 is an apocalyptic number.

It is an amenable number.

123304040213 is a deficient number, since it is larger than the sum of its proper divisors (6489686347).

123304040213 is an equidigital number, since it uses as much as digits as its factorization.

123304040213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489686346.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 123304040213 its reverse (312040403321), we get a palindrome (435344443534).

The spelling of 123304040213 in words is "one hundred twenty-three billion, three hundred four million, forty thousand, two hundred thirteen".