131310213311021 has 4 divisors (see below), whose sum is σ = 131310706319100. Its totient is φ = 131309720302944.

The previous prime is 131310213311009. The next prime is 131310213311051. The reversal of 131310213311021 is 120113312013131.

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 103658075550121 + 27652137760900 = 10181261^2 + 5258530^2 .

It is a cyclic number.

It is not a de Polignac number, because 131310213311021 - 2⁴⁶ = 60941469133357 is a prime.

It is a super-2 number, since 2×131310213311021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131310213311051) 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, 246104306 + ... + 246637283.

It is an arithmetic number, because the mean of its divisors is an integer number (32827676579775).

Almost surely, 2^{131310213311021} is an apocalyptic number.

It is an amenable number.

131310213311021 is a deficient number, since it is larger than the sum of its proper divisors (493008079).

131310213311021 is an equidigital number, since it uses as much as digits as its factorization.

131310213311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493008078.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 131310213311021 its reverse (120113312013131), we get a palindrome (251423525324152).

The spelling of 131310213311021 in words is "one hundred thirty-one trillion, three hundred ten billion, two hundred thirteen million, three hundred eleven thousand, twenty-one".