131011025501021 has 4 divisors (see below), whose sum is σ = 131059746599100. Its totient is φ = 130962304402944.

The previous prime is 131011025500997. The next prime is 131011025501023. The reversal of 131011025501021 is 120105520110131.

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 2694804595396 + 128316220905625 = 1641586^2 + 11327675^2 .

It is a cyclic number.

It is not a de Polignac number, because 131011025501021 - 2¹⁰ = 131011025499997 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 (131011025501023) 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, 24360545006 + ... + 24360550383.

It is an arithmetic number, because the mean of its divisors is an integer number (32764936649775).

Almost surely, 2^{131011025501021} is an apocalyptic number.

It is an amenable number.

131011025501021 is a deficient number, since it is larger than the sum of its proper divisors (48721098079).

131011025501021 is an equidigital number, since it uses as much as digits as its factorization.

131011025501021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48721098078.

The product of its (nonzero) digits is 300, while the sum is 23.

Adding to 131011025501021 its reverse (120105520110131), we get a palindrome (251116545611152).

The spelling of 131011025501021 in words is "one hundred thirty-one trillion, eleven billion, twenty-five million, five hundred one thousand, twenty-one".