131237121 has 8 divisors (see below), whose sum is σ = 177594784. Its totient is φ = 86185440.

The previous prime is 131237111. The next prime is 131237131. The reversal of 131237121 is 121732131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131237111) and next prime (131237131).

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

It is not a de Polignac number, because 131237121 - 2⁵ = 131237089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131237111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326260 + ... + 326661.

It is an arithmetic number, because the mean of its divisors is an integer number (22199348).

Almost surely, 2^131237121 is an apocalyptic number.

It is an amenable number.

131237121 is a deficient number, since it is larger than the sum of its proper divisors (46357663).

131237121 is an equidigital number, since it uses as much as digits as its factorization.

131237121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652991.

The product of its digits is 252, while the sum is 21.

The square root of 131237121 is about 11455.8771379585. The cubic root of 131237121 is about 508.1815554273.

Adding to 131237121 its reverse (121732131), we get a palindrome (252969252).

The spelling of 131237121 in words is "one hundred thirty-one million, two hundred thirty-seven thousand, one hundred twenty-one".