210120101 has 2 divisors, whose sum is σ = 210120102. Its totient is φ = 210120100.

The previous prime is 210120083. The next prime is 210120133. The reversal of 210120101 is 101021012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207331201 + 2788900 = 14399^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120101 - 2¹⁴ = 210103717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210120191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060050 + 105060051.

It is an arithmetic number, because the mean of its divisors is an integer number (105060051).

Almost surely, 2^210120101 is an apocalyptic number.

It is an amenable number.

210120101 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120101 is an equidigital number, since it uses as much as digits as its factorization.

210120101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 210120101 is about 14495.5200320651. The cubic root of 210120101 is about 594.5054865341.

Adding to 210120101 its reverse (101021012), we get a palindrome (311141113).

The spelling of 210120101 in words is "two hundred ten million, one hundred twenty thousand, one hundred one".