123020171 has 2 divisors, whose sum is σ = 123020172. Its totient is φ = 123020170.

The previous prime is 123020167. The next prime is 123020173. The reversal of 123020171 is 171020321.

It is a strong prime.

It is an emirp because it is prime and its reverse (171020321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123020171 - 2² = 123020167 is a prime.

Together with 123020173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123020173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510085 + 61510086.

It is an arithmetic number, because the mean of its divisors is an integer number (61510086).

Almost surely, 2^123020171 is an apocalyptic number.

123020171 is a deficient number, since it is larger than the sum of its proper divisors (1).

123020171 is an equidigital number, since it uses as much as digits as its factorization.

123020171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 123020171 is about 11091.4458480398. The cubic root of 123020171 is about 497.3461672643.

Adding to 123020171 its reverse (171020321), we get a palindrome (294040492).

The spelling of 123020171 in words is "one hundred twenty-three million, twenty thousand, one hundred seventy-one".