211100100221 has 16 divisors (see below), whose sum is σ = 222771354624. Its totient is φ = 199640753664.

The previous prime is 211100100217. The next prime is 211100100247. The reversal of 211100100221 is 122001001112.

It is not a de Polignac number, because 211100100221 - 2² = 211100100217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100100521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2213300 + ... + 2306706.

It is an arithmetic number, because the mean of its divisors is an integer number (13923209664).

Almost surely, 2^211100100221 is an apocalyptic number.

It is an amenable number.

211100100221 is a deficient number, since it is larger than the sum of its proper divisors (11671254403).

211100100221 is a wasteful number, since it uses less digits than its factorization.

211100100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94540.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211100100221 its reverse (122001001112), we get a palindrome (333101101333).

The spelling of 211100100221 in words is "two hundred eleven billion, one hundred million, one hundred thousand, two hundred twenty-one".