131320203421 has 4 divisors (see below), whose sum is σ = 143258403744. Its totient is φ = 119382003100.

The previous prime is 131320203409. The next prime is 131320203463. The reversal of 131320203421 is 124302023131.

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 a cyclic number.

It is not a de Polignac number, because 131320203421 - 2²³ = 131311814813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131320203392 and 131320203401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131320203401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5969100145 + ... + 5969100166.

It is an arithmetic number, because the mean of its divisors is an integer number (35814600936).

Almost surely, 2^131320203421 is an apocalyptic number.

131320203421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131320203421 is a deficient number, since it is larger than the sum of its proper divisors (11938200323).

131320203421 is a wasteful number, since it uses less digits than its factorization.

131320203421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11938200322.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 131320203421 its reverse (124302023131), we get a palindrome (255622226552).

The spelling of 131320203421 in words is "one hundred thirty-one billion, three hundred twenty million, two hundred three thousand, four hundred twenty-one".