210110220020081 has 2 divisors, whose sum is σ = 210110220020082. Its totient is φ = 210110220020080.

The previous prime is 210110220020033. The next prime is 210110220020159. The reversal of 210110220020081 is 180020022011012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126240505062400 + 83869714957681 = 11235680^2 + 9158041^2 .

It is a cyclic number.

It is not a de Polignac number, because 210110220020081 - 2³⁰ = 210109146278257 is a prime.

It is a super-2 number, since 2×210110220020081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210110220020681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055110010040 + 105055110010041.

It is an arithmetic number, because the mean of its divisors is an integer number (105055110010041).

Almost surely, 2^{210110220020081} is an apocalyptic number.

It is an amenable number.

210110220020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

210110220020081 is an equidigital number, since it uses as much as digits as its factorization.

210110220020081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 210110220020081 its reverse (180020022011012), we get a palindrome (390130242031093).

The spelling of 210110220020081 in words is "two hundred ten trillion, one hundred ten billion, two hundred twenty million, twenty thousand, eighty-one".