210021201017 has 2 divisors, whose sum is σ = 210021201018. Its totient is φ = 210021201016.

The previous prime is 210021201001. The next prime is 210021201023. The reversal of 210021201017 is 710102120012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148703555641 + 61317645376 = 385621^2 + 247624^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021201017 - 2⁴ = 210021201001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021200986 and 210021201004.

It is not a weakly prime, because it can be changed into another prime (210021201067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010600508 + 105010600509.

It is an arithmetic number, because the mean of its divisors is an integer number (105010600509).

Almost surely, 2^210021201017 is an apocalyptic number.

It is an amenable number.

210021201017 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021201017 is an equidigital number, since it uses as much as digits as its factorization.

210021201017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 210021201017 its reverse (710102120012), we get a palindrome (920123321029).

The spelling of 210021201017 in words is "two hundred ten billion, twenty-one million, two hundred one thousand, seventeen".