13171121 has 2 divisors, whose sum is σ = 13171122. Its totient is φ = 13171120.

The previous prime is 13171097. The next prime is 13171129. The reversal of 13171121 is 12117131.

13171121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9388096 + 3783025 = 3064^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 13171121 - 2¹⁴ = 13154737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13171121.

It is not a weakly prime, because it can be changed into another prime (13171129) 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, 6585560 + 6585561.

It is an arithmetic number, because the mean of its divisors is an integer number (6585561).

Almost surely, 2^13171121 is an apocalyptic number.

It is an amenable number.

13171121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13171121 is an equidigital number, since it uses as much as digits as its factorization.

13171121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42, while the sum is 17.

The square root of 13171121 is about 3629.2039071951. The cubic root of 13171121 is about 236.1606741238.

Adding to 13171121 its reverse (12117131), we get a palindrome (25288252).

The spelling of 13171121 in words is "thirteen million, one hundred seventy-one thousand, one hundred twenty-one".