1312303111213 has 4 divisors (see below), whose sum is σ = 1313834387580. Its totient is φ = 1310771834848.

The previous prime is 1312303111201. The next prime is 1312303111243. The reversal of 1312303111213 is 3121113032131.

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 1085434752964 + 226868358249 = 1041842^2 + 476307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312303111213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312303111243) 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, 765636898 + ... + 765638611.

It is an arithmetic number, because the mean of its divisors is an integer number (328458596895).

Almost surely, 2^{1312303111213} is an apocalyptic number.

It is an amenable number.

1312303111213 is a deficient number, since it is larger than the sum of its proper divisors (1531276367).

1312303111213 is an equidigital number, since it uses as much as digits as its factorization.

1312303111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531276366.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1312303111213 its reverse (3121113032131), we get a palindrome (4433416143344).

The spelling of 1312303111213 in words is "one trillion, three hundred twelve billion, three hundred three million, one hundred eleven thousand, two hundred thirteen".