Перевод в строку и вычисления

if str(n) == str(n)[::-1]:

def getReverse(n1):
    n2 = 0
    while n1 > 0:
        digit = n1 % 10
        n1 = n1 // 10
        n2 = n2 * 10
        n2 = n2 + digit
    return n2
 
def isPalindrom(n):
    return n == getReverse(n)

>>> from ctypes import cdll
>>> from ctypes import c_int
>>> rev_lib = cdll.LoadLibrary("/root/reverse.so")
>>> rev = rev_lib.reverse
>>> rev.restype = c_int
>>>
>>> # c version
... def reverse1(n):
...     return n == rev(n)
...
>>> # py version str
... def reverse2_1(n):
...     return str(n)[::-1]
...
>>> def reverse2_2(n):
...     return str(n) == reverse2_1(n)
...
>>> # py version alg
... def reverse3_1(n):
...     reverse = 0
...     while n != 0:
...         reverse = reverse * 10
...         reverse = reverse + n % 10
...         n = n / 10
...     return reverse
...
>>> def reverse3_2(n):
...     return n == reverse3_1(n)

>>> reverse1(1234)
False
>>> reverse1(1221)
True
>>>
>>> reverse2_2(1234)
False
>>> reverse2_2(1221)
True
>>>
>>> reverse3_2(1234)
False
>>> reverse3_2(1221)
True
>>>

>>> import timeit
>>>
>>> timeit.repeat("for x in range(100, 1000): reverse1(x)", "from __main__ import reverse1", number=10000)
[3.4779930114746094, 3.1083719730377197, 3.0455260276794434]
>>> timeit.repeat("for x in range(100, 1000): reverse2_2(x)", "from __main__ import reverse2_2", number=10000)
[6.101519823074341, 7.477694988250732, 6.1712939739227295]
>>> timeit.repeat("for x in range(100, 1000): reverse3_2(x)", "from __main__ import reverse3_2", number=10000)
[7.358089923858643, 7.048866033554077, 7.0321009159088135]