123205140313 has 4 divisors (see below), whose sum is σ = 128561885568. Its totient is φ = 117848395060.

The previous prime is 123205140307. The next prime is 123205140329. The reversal of 123205140313 is 313041502321.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 123205140313 - 2³³ = 114615205721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123205180313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2678372593 + ... + 2678372638.

It is an arithmetic number, because the mean of its divisors is an integer number (32140471392).

Almost surely, 2^123205140313 is an apocalyptic number.

It is an amenable number.

123205140313 is a deficient number, since it is larger than the sum of its proper divisors (5356745255).

123205140313 is an equidigital number, since it uses as much as digits as its factorization.

123205140313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356745254.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 123205140313 its reverse (313041502321), we get a palindrome (436246642634).

The spelling of 123205140313 in words is "one hundred twenty-three billion, two hundred five million, one hundred forty thousand, three hundred thirteen".