131344121 has 4 divisors (see below), whose sum is σ = 131384052. Its totient is φ = 131304192.

The previous prime is 131344079. The next prime is 131344127. The reversal of 131344121 is 121443131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121443131 = 61 ⋅1990871.

It can be written as a sum of positive squares in 2 ways, for example, as 6150400 + 125193721 = 2480^2 + 11189^2 .

It is a cyclic number.

It is not a de Polignac number, because 131344121 - 2¹⁰ = 131343097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131344093 and 131344102.

It is not an unprimeable number, because it can be changed into a prime (131344127) 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, 14540 + ... + 21773.

It is an arithmetic number, because the mean of its divisors is an integer number (32846013).

Almost surely, 2^131344121 is an apocalyptic number.

It is an amenable number.

131344121 is a deficient number, since it is larger than the sum of its proper divisors (39931).

131344121 is an equidigital number, since it uses as much as digits as its factorization.

131344121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39930.

The product of its digits is 288, while the sum is 20.

The square root of 131344121 is about 11460.5462784284. The cubic root of 131344121 is about 508.3196277830.

Adding to 131344121 its reverse (121443131), we get a palindrome (252787252).

The spelling of 131344121 in words is "one hundred thirty-one million, three hundred forty-four thousand, one hundred twenty-one".