1312211302313 has 16 divisors (see below), whose sum is σ = 1384860531600. Its totient is φ = 1241640744960.

The previous prime is 1312211302267. The next prime is 1312211302343. The reversal of 1312211302313 is 3132031122131.

It can be written as a sum of positive squares in 8 ways, for example, as 244186199104 + 1068025103209 = 494152^2 + 1033453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312211302313 - 2⁶ = 1312211302249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312211302343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1957958 + ... + 2541263.

It is an arithmetic number, because the mean of its divisors is an integer number (86553783225).

Almost surely, 2^{1312211302313} is an apocalyptic number.

It is an amenable number.

1312211302313 is a deficient number, since it is larger than the sum of its proper divisors (72649229287).

1312211302313 is a wasteful number, since it uses less digits than its factorization.

1312211302313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4499452.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1312211302313 its reverse (3132031122131), we get a palindrome (4444242424444).

The spelling of 1312211302313 in words is "one trillion, three hundred twelve billion, two hundred eleven million, three hundred two thousand, three hundred thirteen".