131132421 has 12 divisors (see below), whose sum is σ = 216472672. Its totient is φ = 74932776.

The previous prime is 131132411. The next prime is 131132423. The reversal of 131132421 is 124231131.

It is not a de Polignac number, because 131132421 - 2⁹ = 131131909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131132394 and 131132403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131132423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1040671 + ... + 1040796.

Almost surely, 2^131132421 is an apocalyptic number.

It is an amenable number.

131132421 is a deficient number, since it is larger than the sum of its proper divisors (85340251).

131132421 is a wasteful number, since it uses less digits than its factorization.

131132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081480 (or 2081477 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 131132421 is about 11451.3065193453. The cubic root of 131132421 is about 508.0463783168.

Adding to 131132421 its reverse (124231131), we get a palindrome (255363552).

The spelling of 131132421 in words is "one hundred thirty-one million, one hundred thirty-two thousand, four hundred twenty-one".