131440121 has 8 divisors (see below), whose sum is σ = 136202880. Its totient is φ = 126754992.

The previous prime is 131440117. The next prime is 131440139. The reversal of 131440121 is 121044131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 131440121 - 2² = 131440117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131440121.

It is not an unprimeable number, because it can be changed into a prime (131440171) 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 7 ways as a sum of consecutive naturals, for example, 15950 + ... + 22743.

It is an arithmetic number, because the mean of its divisors is an integer number (17025360).

Almost surely, 2^131440121 is an apocalyptic number.

It is an amenable number.

131440121 is a deficient number, since it is larger than the sum of its proper divisors (4762759).

131440121 is an equidigital number, since it uses as much as digits as its factorization.

131440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38815.

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

The square root of 131440121 is about 11464.7337954267. The cubic root of 131440121 is about 508.4434419785.

Adding to 131440121 its reverse (121044131), we get a palindrome (252484252).

The spelling of 131440121 in words is "one hundred thirty-one million, four hundred forty thousand, one hundred twenty-one".