12103020323305 has 4 divisors (see below), whose sum is σ = 14523624387972. Its totient is φ = 9682416258640.

The previous prime is 12103020323291. The next prime is 12103020323311. The reversal of 12103020323305 is 50332302030121.

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 8998704046656 + 3104316276649 = 2999784^2 + 1761907^2 .

It is not a de Polignac number, because 12103020323305 - 2²⁷ = 12102886105577 is a prime.

It is a super-2 number, since 2×12103020323305² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12103020323305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1210302032326 + ... + 1210302032335.

It is an arithmetic number, because the mean of its divisors is an integer number (3630906096993).

Almost surely, 2^{12103020323305} is an apocalyptic number.

It is an amenable number.

12103020323305 is a deficient number, since it is larger than the sum of its proper divisors (2420604064667).

12103020323305 is an equidigital number, since it uses as much as digits as its factorization.

12103020323305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420604064666.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 12103020323305 its reverse (50332302030121), we get a palindrome (62435322353426).

The spelling of 12103020323305 in words is "twelve trillion, one hundred three billion, twenty million, three hundred twenty-three thousand, three hundred five".