210101212221101 has 2 divisors, whose sum is σ = 210101212221102. Its totient is φ = 210101212221100.

The previous prime is 210101212221083. The next prime is 210101212221161. The reversal of 210101212221101 is 101122212101012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144181833365476 + 65919378855625 = 12007574^2 + 8119075^2 .

It is a cyclic number.

It is not a de Polignac number, because 210101212221101 - 2³⁰ = 210100138479277 is a prime.

It is a super-2 number, since 2×210101212221101² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210101212221101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210101212221161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105050606110550 + 105050606110551.

It is an arithmetic number, because the mean of its divisors is an integer number (105050606110551).

Almost surely, 2^{210101212221101} is an apocalyptic number.

It is an amenable number.

210101212221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

210101212221101 is an equidigital number, since it uses as much as digits as its factorization.

210101212221101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210101212221101 its reverse (101122212101012), we get a palindrome (311223424322113).

The spelling of 210101212221101 in words is "two hundred ten trillion, one hundred one billion, two hundred twelve million, two hundred twenty-one thousand, one hundred one".