131122321 has 8 divisors (see below), whose sum is σ = 144766944. Its totient is φ = 117765120.

The previous prime is 131122297. The next prime is 131122337. The reversal of 131122321 is 123221131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131122321 - 2¹³ = 131114129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131122295 and 131122304.

It is not an unprimeable number, because it can be changed into a prime (131122361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70896 + ... + 72721.

It is an arithmetic number, because the mean of its divisors is an integer number (18095868).

Almost surely, 2^131122321 is an apocalyptic number.

131122321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131122321 is a deficient number, since it is larger than the sum of its proper divisors (13644623).

131122321 is a wasteful number, since it uses less digits than its factorization.

131122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143711.

The product of its digits is 72, while the sum is 16.

The square root of 131122321 is about 11450.8655131392. The cubic root of 131122321 is about 508.0333345042.

Adding to 131122321 its reverse (123221131), we get a palindrome (254343452).

It can be divided in two parts, 1311 and 22321, that added together give a palindrome (23632).

The spelling of 131122321 in words is "one hundred thirty-one million, one hundred twenty-two thousand, three hundred twenty-one".