131141403020021 has 4 divisors (see below), whose sum is σ = 131207871041772. Its totient is φ = 131074934998272.

The previous prime is 131141403019903. The next prime is 131141403020029. The reversal of 131141403020021 is 120020304141131.

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 22504454380996 + 108636948639025 = 4743886^2 + 10422905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131141403020021 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 (131141403020029) 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, 33234007916 + ... + 33234011861.

It is an arithmetic number, because the mean of its divisors is an integer number (32801967760443).

Almost surely, 2^{131141403020021} is an apocalyptic number.

It is an amenable number.

131141403020021 is a deficient number, since it is larger than the sum of its proper divisors (66468021751).

131141403020021 is an equidigital number, since it uses as much as digits as its factorization.

131141403020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66468021750.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 131141403020021 its reverse (120020304141131), we get a palindrome (251161707161152).

The spelling of 131141403020021 in words is "one hundred thirty-one trillion, one hundred forty-one billion, four hundred three million, twenty thousand, twenty-one".