131012104521 has 4 divisors (see below), whose sum is σ = 174682806032. Its totient is φ = 87341403012.

The previous prime is 131012104519. The next prime is 131012104523. The reversal of 131012104521 is 125401210131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (131012104519) and next prime (131012104523).

It is not a de Polignac number, because 131012104521 - 2¹ = 131012104519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131012104523) 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, 21835350751 + ... + 21835350756.

It is an arithmetic number, because the mean of its divisors is an integer number (43670701508).

Almost surely, 2^131012104521 is an apocalyptic number.

It is an amenable number.

131012104521 is a deficient number, since it is larger than the sum of its proper divisors (43670701511).

131012104521 is an equidigital number, since it uses as much as digits as its factorization.

131012104521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43670701510.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 131012104521 its reverse (125401210131), we get a palindrome (256413314652).

The spelling of 131012104521 in words is "one hundred thirty-one billion, twelve million, one hundred four thousand, five hundred twenty-one".