210123030217 has 2 divisors, whose sum is σ = 210123030218. Its totient is φ = 210123030216.

The previous prime is 210123030211. The next prime is 210123030253. The reversal of 210123030217 is 712030321012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169039388736 + 41083641481 = 411144^2 + 202691^2 .

It is a cyclic number.

It is not a de Polignac number, because 210123030217 - 2¹⁵ = 210122997449 is a prime.

It is not a weakly prime, because it can be changed into another prime (210123030211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061515108 + 105061515109.

It is an arithmetic number, because the mean of its divisors is an integer number (105061515109).

Almost surely, 2^210123030217 is an apocalyptic number.

It is an amenable number.

210123030217 is a deficient number, since it is larger than the sum of its proper divisors (1).

210123030217 is an equidigital number, since it uses as much as digits as its factorization.

210123030217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 210123030217 its reverse (712030321012), we get a palindrome (922153351229).

The spelling of 210123030217 in words is "two hundred ten billion, one hundred twenty-three million, thirty thousand, two hundred seventeen".