211102120221 has 4 divisors (see below), whose sum is σ = 281469493632. Its totient is φ = 140734746812.

The previous prime is 211102120211. The next prime is 211102120247. The reversal of 211102120221 is 122021201112.

211102120221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211102120221 - 2⁷ = 211102120093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211102120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211102120211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35183686701 + ... + 35183686706.

It is an arithmetic number, because the mean of its divisors is an integer number (70367373408).

Almost surely, 2^211102120221 is an apocalyptic number.

It is an amenable number.

211102120221 is a deficient number, since it is larger than the sum of its proper divisors (70367373411).

211102120221 is an equidigital number, since it uses as much as digits as its factorization.

211102120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70367373410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211102120221 its reverse (122021201112), we get a palindrome (333123321333).

The spelling of 211102120221 in words is "two hundred eleven billion, one hundred two million, one hundred twenty thousand, two hundred twenty-one".