131404013121 has 4 divisors (see below), whose sum is σ = 175205350832. Its totient is φ = 87602675412.

The previous prime is 131404013119. The next prime is 131404013141. The reversal of 131404013121 is 121310404131.

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 not a de Polignac number, because 131404013121 - 2¹ = 131404013119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131404013141) 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, 21900668851 + ... + 21900668856.

It is an arithmetic number, because the mean of its divisors is an integer number (43801337708).

Almost surely, 2^131404013121 is an apocalyptic number.

It is an amenable number.

131404013121 is a deficient number, since it is larger than the sum of its proper divisors (43801337711).

131404013121 is an equidigital number, since it uses as much as digits as its factorization.

131404013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43801337710.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 131404013121 its reverse (121310404131), we get a palindrome (252714417252).

The spelling of 131404013121 in words is "one hundred thirty-one billion, four hundred four million, thirteen thousand, one hundred twenty-one".