1312321202113 has 4 divisors (see below), whose sum is σ = 1313089092180. Its totient is φ = 1311553312048.

The previous prime is 1312321202099. The next prime is 1312321202167. The reversal of 1312321202113 is 3112021232131.

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 75192220944 + 1237128981169 = 274212^2 + 1112263^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312321202113 - 2⁵ = 1312321202081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312321209113) 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, 383942470 + ... + 383945887.

It is an arithmetic number, because the mean of its divisors is an integer number (328272273045).

Almost surely, 2^{1312321202113} is an apocalyptic number.

It is an amenable number.

1312321202113 is a deficient number, since it is larger than the sum of its proper divisors (767890067).

1312321202113 is an equidigital number, since it uses as much as digits as its factorization.

1312321202113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767890066.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1312321202113 its reverse (3112021232131), we get a palindrome (4424342434244).

It can be divided in two parts, 13123 and 21202113, that added together give a square (21215236 = 4606²).

The spelling of 1312321202113 in words is "one trillion, three hundred twelve billion, three hundred twenty-one million, two hundred two thousand, one hundred thirteen".