131301221330021 has 4 divisors (see below), whose sum is σ = 131307303209100. Its totient is φ = 131295139450944.

The previous prime is 131301221329973. The next prime is 131301221330047. The reversal of 131301221330021 is 120033122103131.

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 51030820939396 + 80270400390625 = 7143586^2 + 8959375^2 .

It is a cyclic number.

It is not a de Polignac number, because 131301221330021 - 2²² = 131301217135717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131301221330051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3040907156 + ... + 3040950333.

It is an arithmetic number, because the mean of its divisors is an integer number (32826825802275).

Almost surely, 2^{131301221330021} is an apocalyptic number.

It is an amenable number.

131301221330021 is a deficient number, since it is larger than the sum of its proper divisors (6081879079).

131301221330021 is an equidigital number, since it uses as much as digits as its factorization.

131301221330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6081879078.

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

Adding to 131301221330021 its reverse (120033122103131), we get a palindrome (251334343433152).

The spelling of 131301221330021 in words is "one hundred thirty-one trillion, three hundred one billion, two hundred twenty-one million, three hundred thirty thousand, twenty-one".