211102110020221 has 4 divisors (see below), whose sum is σ = 241259554308832. Its totient is φ = 180944665731612.

The previous prime is 211102110020167. The next prime is 211102110020353. The reversal of 211102110020221 is 122020011201112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211102110020221 - 2²⁵ = 211102076465789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211102110020195 and 211102110020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211102110120221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15078722144295 + ... + 15078722144308.

It is an arithmetic number, because the mean of its divisors is an integer number (60314888577208).

Almost surely, 2^{211102110020221} is an apocalyptic number.

It is an amenable number.

211102110020221 is a deficient number, since it is larger than the sum of its proper divisors (30157444288611).

211102110020221 is an equidigital number, since it uses as much as digits as its factorization.

211102110020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30157444288610.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211102110020221 its reverse (122020011201112), we get a palindrome (333122121221333).

The spelling of 211102110020221 in words is "two hundred eleven trillion, one hundred two billion, one hundred ten million, twenty thousand, two hundred twenty-one".