211100221100 has 36 divisors (see below), whose sum is σ = 459363567600. Its totient is φ = 84204864960.

The previous prime is 211100221093. The next prime is 211100221181. The reversal of 211100221100 is 1122001112.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2904215 + ... + 2976014.

It is an arithmetic number, because the mean of its divisors is an integer number (12760099100).

Almost surely, 2^211100221100 is an apocalyptic number.

211100221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211100221100 is an abundant number, since it is smaller than the sum of its proper divisors (248263346500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211100221100 is a wasteful number, since it uses less digits than its factorization.

211100221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5880602 (or 5880595 counting only the distinct ones).

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

Adding to 211100221100 its reverse (1122001112), we get a palindrome (212222222212).

The spelling of 211100221100 in words is "two hundred eleven billion, one hundred million, two hundred twenty-one thousand, one hundred".