131023121320213 has 4 divisors (see below), whose sum is σ = 131023656656908. Its totient is φ = 131022585983520.

The previous prime is 131023121320153. The next prime is 131023121320241. The reversal of 131023121320213 is 312023121320131.

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 104487198722404 + 26535922597809 = 10221898^2 + 5151303^2 .

It is a cyclic number.

It is not a de Polignac number, because 131023121320213 - 2¹³ = 131023121312021 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 (131023121320253) 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, 267301056 + ... + 267790777.

It is an arithmetic number, because the mean of its divisors is an integer number (32755914164227).

Almost surely, 2^{131023121320213} is an apocalyptic number.

It is an amenable number.

131023121320213 is a deficient number, since it is larger than the sum of its proper divisors (535336695).

131023121320213 is an equidigital number, since it uses as much as digits as its factorization.

131023121320213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535336694.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 131023121320213 its reverse (312023121320131), we get a palindrome (443046242640344).

The spelling of 131023121320213 in words is "one hundred thirty-one trillion, twenty-three billion, one hundred twenty-one million, three hundred twenty thousand, two hundred thirteen".