131132121321 has 4 divisors (see below), whose sum is σ = 174842828432. Its totient is φ = 87421414212.

The previous prime is 131132121311. The next prime is 131132121359. The reversal of 131132121321 is 123121231131.

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: 123121231131 = 3 ⋅41040410377.

It is not a de Polignac number, because 131132121321 - 2¹⁹ = 131131597033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131132121301) 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, 21855353551 + ... + 21855353556.

It is an arithmetic number, because the mean of its divisors is an integer number (43710707108).

Almost surely, 2^131132121321 is an apocalyptic number.

It is an amenable number.

131132121321 is a deficient number, since it is larger than the sum of its proper divisors (43710707111).

131132121321 is an equidigital number, since it uses as much as digits as its factorization.

131132121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43710707110.

The product of its digits is 216, while the sum is 21.

Adding to 131132121321 its reverse (123121231131), we get a palindrome (254253352452).

The spelling of 131132121321 in words is "one hundred thirty-one billion, one hundred thirty-two million, one hundred twenty-one thousand, three hundred twenty-one".