123311440171 has 2 divisors, whose sum is σ = 123311440172. Its totient is φ = 123311440170.

The previous prime is 123311440163. The next prime is 123311440177. The reversal of 123311440171 is 171044113321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123311440171 - 2³ = 123311440163 is a prime.

It is a super-2 number, since 2×123311440171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123311440177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61655720085 + 61655720086.

It is an arithmetic number, because the mean of its divisors is an integer number (61655720086).

Almost surely, 2^123311440171 is an apocalyptic number.

123311440171 is a deficient number, since it is larger than the sum of its proper divisors (1).

123311440171 is an equidigital number, since it uses as much as digits as its factorization.

123311440171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 123311440171 its reverse (171044113321), we get a palindrome (294355553492).

The spelling of 123311440171 in words is "one hundred twenty-three billion, three hundred eleven million, four hundred forty thousand, one hundred seventy-one".