131131013021 has 8 divisors (see below), whose sum is σ = 137216136024. Its totient is φ = 125179629120.

The previous prime is 131131013011. The next prime is 131131013081. The reversal of 131131013021 is 120310131131.

It can be written as a sum of positive squares in 4 ways, for example, as 102227272900 + 28903740121 = 319730^2 + 170011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131131013021 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 (131131013011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33432770 + ... + 33436691.

It is an arithmetic number, because the mean of its divisors is an integer number (17152017003).

Almost surely, 2^131131013021 is an apocalyptic number.

It is an amenable number.

131131013021 is a deficient number, since it is larger than the sum of its proper divisors (6085123003).

131131013021 is an equidigital number, since it uses as much as digits as its factorization.

131131013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66869551.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 131131013021 its reverse (120310131131), we get a palindrome (251441144152).

The spelling of 131131013021 in words is "one hundred thirty-one billion, one hundred thirty-one million, thirteen thousand, twenty-one".