131142132020021 has 4 divisors (see below), whose sum is σ = 135664274503500. Its totient is φ = 126619989536544.

The previous prime is 131142132019979. The next prime is 131142132020113. The reversal of 131142132020021 is 120020231241131.

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 109577160703921 + 21564971316100 = 10467911^2 + 4643810^2 .

It is a cyclic number.

It is not a de Polignac number, because 131142132020021 - 2⁴⁶ = 60773387842357 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 (131142132020521) 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, 2261071241696 + ... + 2261071241753.

It is an arithmetic number, because the mean of its divisors is an integer number (33916068625875).

Almost surely, 2^{131142132020021} is an apocalyptic number.

It is an amenable number.

131142132020021 is a deficient number, since it is larger than the sum of its proper divisors (4522142483479).

131142132020021 is an equidigital number, since it uses as much as digits as its factorization.

131142132020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522142483478.

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

Adding to 131142132020021 its reverse (120020231241131), we get a palindrome (251162363261152).

The spelling of 131142132020021 in words is "one hundred thirty-one trillion, one hundred forty-two billion, one hundred thirty-two million, twenty thousand, twenty-one".