211330211100 has 72 divisors (see below), whose sum is σ = 615343459248. Its totient is φ = 55995763200.

The previous prime is 211330211093. The next prime is 211330211119. The reversal of 211330211100 is 1112033112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211330211100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2196321 + ... + 2290520.

It is an arithmetic number, because the mean of its divisors is an integer number (8546436934).

Almost surely, 2^211330211100 is an apocalyptic number.

211330211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211330211100 is an abundant number, since it is smaller than the sum of its proper divisors (404013248148).

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

211330211100 is a wasteful number, since it uses less digits than its factorization.

211330211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487015 (or 4487008 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 211330211100 its reverse (1112033112), we get a palindrome (212442244212).

The spelling of 211330211100 in words is "two hundred eleven billion, three hundred thirty million, two hundred eleven thousand, one hundred".