1312023000205 has 4 divisors (see below), whose sum is σ = 1574427600252. Its totient is φ = 1049618400160.

The previous prime is 1312023000137. The next prime is 1312023000227. The reversal of 1312023000205 is 5020003202131.

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 537703958089 + 774319042116 = 733283^2 + 879954^2 .

It is not a de Polignac number, because 1312023000205 - 2⁷ = 1312023000077 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 131202300016 + ... + 131202300025.

It is an arithmetic number, because the mean of its divisors is an integer number (393606900063).

Almost surely, 2^{1312023000205} is an apocalyptic number.

It is an amenable number.

1312023000205 is a deficient number, since it is larger than the sum of its proper divisors (262404600047).

1312023000205 is an equidigital number, since it uses as much as digits as its factorization.

1312023000205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262404600046.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 1312023000205 its reverse (5020003202131), we get a palindrome (6332026202336).

The spelling of 1312023000205 in words is "one trillion, three hundred twelve billion, twenty-three million, two hundred five", and thus it is an aban number.