123011171 has 2 divisors, whose sum is σ = 123011172. Its totient is φ = 123011170.

The previous prime is 123011143. The next prime is 123011177. The reversal of 123011171 is 171110321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123011171 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123011177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61505585 + 61505586.

It is an arithmetic number, because the mean of its divisors is an integer number (61505586).

Almost surely, 2^123011171 is an apocalyptic number.

123011171 is a deficient number, since it is larger than the sum of its proper divisors (1).

123011171 is an equidigital number, since it uses as much as digits as its factorization.

123011171 is an odious number, because the sum of its binary digits is odd.

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

The square root of 123011171 is about 11091.0401225494. The cubic root of 123011171 is about 497.3340385631.

Adding to 123011171 its reverse (171110321), we get a palindrome (294121492).

The spelling of 123011171 in words is "one hundred twenty-three million, eleven thousand, one hundred seventy-one".