1021200017 has 2 divisors, whose sum is σ = 1021200018. Its totient is φ = 1021200016.

The previous prime is 1021199983. The next prime is 1021200031. The reversal of 1021200017 is 7100021201.

It is an a-pointer prime, because the next prime (1021200031) can be obtained adding 1021200017 to its sum of digits (14).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969948736 + 51251281 = 31144^2 + 7159^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021200017 - 2⁶ = 1021199953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021199974 and 1021200010.

It is not a weakly prime, because it can be changed into another prime (1021230017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510600008 + 510600009.

It is an arithmetic number, because the mean of its divisors is an integer number (510600009).

Almost surely, 2^1021200017 is an apocalyptic number.

It is an amenable number.

1021200017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021200017 is an equidigital number, since it uses as much as digits as its factorization.

1021200017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 1021200017 is about 31956.2203178035. The cubic root of 1021200017 is about 1007.0173144474.

Adding to 1021200017 its reverse (7100021201), we get a palindrome (8121221218).

The spelling of 1021200017 in words is "one billion, twenty-one million, two hundred thousand, seventeen".