17002042121 has 2 divisors, whose sum is σ = 17002042122. Its totient is φ = 17002042120.

The previous prime is 17002042081. The next prime is 17002042133. The reversal of 17002042121 is 12124020071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16446780025 + 555262096 = 128245^2 + 23564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17002042121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17002042093 and 17002042102.

It is not a weakly prime, because it can be changed into another prime (17002042181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8501021060 + 8501021061.

It is an arithmetic number, because the mean of its divisors is an integer number (8501021061).

Almost surely, 2^17002042121 is an apocalyptic number.

It is an amenable number.

17002042121 is a deficient number, since it is larger than the sum of its proper divisors (1).

17002042121 is an equidigital number, since it uses as much as digits as its factorization.

17002042121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 17002042121 its reverse (12124020071), we get a palindrome (29126062192).

The spelling of 17002042121 in words is "seventeen billion, two million, forty-two thousand, one hundred twenty-one".