1313220313213 has 4 divisors (see below), whose sum is σ = 1324841732028. Its totient is φ = 1301598894400.

The previous prime is 1313220313183. The next prime is 1313220313231. The reversal of 1313220313213 is 3123130223131.

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 36812945689 + 1276407367524 = 191867^2 + 1129782^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313220313213 - 2²¹ = 1313218216061 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 (1313220313243) 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, 5810709238 + ... + 5810709463.

It is an arithmetic number, because the mean of its divisors is an integer number (331210433007).

Almost surely, 2^{1313220313213} is an apocalyptic number.

It is an amenable number.

1313220313213 is a deficient number, since it is larger than the sum of its proper divisors (11621418815).

1313220313213 is a wasteful number, since it uses less digits than its factorization.

1313220313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11621418814.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1313220313213 its reverse (3123130223131), we get a palindrome (4436350536344).

The spelling of 1313220313213 in words is "one trillion, three hundred thirteen billion, two hundred twenty million, three hundred thirteen thousand, two hundred thirteen".