131110321 has 2 divisors, whose sum is σ = 131110322. Its totient is φ = 131110320.

The previous prime is 131110303. The next prime is 131110339. The reversal of 131110321 is 123011131.

It is a balanced prime because it is at equal distance from previous prime (131110303) and next prime (131110339).

It can be written as a sum of positive squares in only one way, i.e., 108680625 + 22429696 = 10425^2 + 4736^2 .

It is a cyclic number.

It is not a de Polignac number, because 131110321 - 2⁷ = 131110193 is a prime.

It is not a weakly prime, because it can be changed into another prime (131110391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65555160 + 65555161.

It is an arithmetic number, because the mean of its divisors is an integer number (65555161).

Almost surely, 2^131110321 is an apocalyptic number.

It is an amenable number.

131110321 is a deficient number, since it is larger than the sum of its proper divisors (1).

131110321 is an equidigital number, since it uses as much as digits as its factorization.

131110321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 131110321 is about 11450.3415232909. The cubic root of 131110321 is about 508.0178360344.

Adding to 131110321 its reverse (123011131), we get a palindrome (254121452).

The spelling of 131110321 in words is "one hundred thirty-one million, one hundred ten thousand, three hundred twenty-one".