131104421 has 4 divisors (see below), whose sum is σ = 149833632. Its totient is φ = 112375212.

The previous prime is 131104403. The next prime is 131104451. The reversal of 131104421 is 124401131.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124401131 = 4259 ⋅29209.

It is a cyclic number.

It is not a de Polignac number, because 131104421 - 2¹⁸ = 130842277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131104421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131104451) 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, 9364595 + ... + 9364608.

It is an arithmetic number, because the mean of its divisors is an integer number (37458408).

Almost surely, 2^131104421 is an apocalyptic number.

It is an amenable number.

131104421 is a deficient number, since it is larger than the sum of its proper divisors (18729211).

131104421 is an equidigital number, since it uses as much as digits as its factorization.

131104421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18729210.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 131104421 is about 11450.0838861556. The cubic root of 131104421 is about 508.0102156067.

Adding to 131104421 its reverse (124401131), we get a palindrome (255505552).

The spelling of 131104421 in words is "one hundred thirty-one million, one hundred four thousand, four hundred twenty-one".