210001218073 has 2 divisors, whose sum is σ = 210001218074. Its totient is φ = 210001218072.

The previous prime is 210001217999. The next prime is 210001218101. The reversal of 210001218073 is 370812100012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203646417984 + 6354800089 = 451272^2 + 79717^2 .

It is a cyclic number.

It is not a de Polignac number, because 210001218073 - 2³⁷ = 72562264601 is a prime.

It is not a weakly prime, because it can be changed into another prime (210001218673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000609036 + 105000609037.

It is an arithmetic number, because the mean of its divisors is an integer number (105000609037).

Almost surely, 2^210001218073 is an apocalyptic number.

It is an amenable number.

210001218073 is a deficient number, since it is larger than the sum of its proper divisors (1).

210001218073 is an equidigital number, since it uses as much as digits as its factorization.

210001218073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 210001218073 its reverse (370812100012), we get a palindrome (580813318085).

The spelling of 210001218073 in words is "two hundred ten billion, one million, two hundred eighteen thousand, seventy-three".