1312321011213 has 4 divisors (see below), whose sum is σ = 1749761348288. Its totient is φ = 874880674140.

The previous prime is 1312321011161. The next prime is 1312321011223. The reversal of 1312321011213 is 3121101232131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1312321011213 - 2²¹ = 1312318914061 is a prime.

It is a super-2 number, since 2×1312321011213² (a number of 25 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 1312321011213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312321011223) 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, 218720168533 + ... + 218720168538.

It is an arithmetic number, because the mean of its divisors is an integer number (437440337072).

Almost surely, 2^{1312321011213} is an apocalyptic number.

It is an amenable number.

1312321011213 is a deficient number, since it is larger than the sum of its proper divisors (437440337075).

1312321011213 is an equidigital number, since it uses as much as digits as its factorization.

1312321011213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437440337074.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1312321011213 its reverse (3121101232131), we get a palindrome (4433422243344).

The spelling of 1312321011213 in words is "one trillion, three hundred twelve billion, three hundred twenty-one million, eleven thousand, two hundred thirteen".