210110081 has 2 divisors, whose sum is σ = 210110082. Its totient is φ = 210110080.

The previous prime is 210110071. The next prime is 210110111. The reversal of 210110081 is 180011012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190881856 + 19228225 = 13816^2 + 4385^2 .

It is a cyclic number.

It is not a de Polignac number, because 210110081 - 2¹⁰ = 210109057 is a prime.

It is a super-2 number, since 2×210110081² = 88292492275653122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210110071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055040 + 105055041.

It is an arithmetic number, because the mean of its divisors is an integer number (105055041).

Almost surely, 2^210110081 is an apocalyptic number.

It is an amenable number.

210110081 is a deficient number, since it is larger than the sum of its proper divisors (1).

210110081 is an equidigital number, since it uses as much as digits as its factorization.

210110081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 210110081 is about 14495.1744039180. The cubic root of 210110081 is about 594.4960363202.

Adding to 210110081 its reverse (180011012), we get a palindrome (390121093).

The spelling of 210110081 in words is "two hundred ten million, one hundred ten thousand, eighty-one".