331486121 has 2 divisors, whose sum is σ = 331486122. Its totient is φ = 331486120.

The previous prime is 331486109. The next prime is 331486171. The reversal of 331486121 is 121684133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308494096 + 22992025 = 17564^2 + 4795^2 .

It is an emirp because it is prime and its reverse (121684133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331486121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331486171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165743060 + 165743061.

It is an arithmetic number, because the mean of its divisors is an integer number (165743061).

Almost surely, 2^331486121 is an apocalyptic number.

It is an amenable number.

331486121 is a deficient number, since it is larger than the sum of its proper divisors (1).

331486121 is an equidigital number, since it uses as much as digits as its factorization.

331486121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 331486121 is about 18206.7603103902. The cubic root of 331486121 is about 692.0781156596.

The spelling of 331486121 in words is "three hundred thirty-one million, four hundred eighty-six thousand, one hundred twenty-one".