1020123017 has 2 divisors, whose sum is σ = 1020123018. Its totient is φ = 1020123016.

The previous prime is 1020123001. The next prime is 1020123019. The reversal of 1020123017 is 7103210201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1015123321 + 4999696 = 31861^2 + 2236^2 .

It is an emirp because it is prime and its reverse (7103210201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020123017 - 2⁴ = 1020123001 is a prime.

Together with 1020123019, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020122986 and 1020123004.

It is not a weakly prime, because it can be changed into another prime (1020123019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510061508 + 510061509.

It is an arithmetic number, because the mean of its divisors is an integer number (510061509).

Almost surely, 2^1020123017 is an apocalyptic number.

It is an amenable number.

1020123017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020123017 is an equidigital number, since it uses as much as digits as its factorization.

1020123017 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 1020123017 is about 31939.3646931181. The cubic root of 1020123017 is about 1006.6631758111.

Adding to 1020123017 its reverse (7103210201), we get a palindrome (8123333218).

The spelling of 1020123017 in words is "one billion, twenty million, one hundred twenty-three thousand, seventeen".