211131120100 has 72 divisors (see below), whose sum is σ = 462807753408. Its totient is φ = 83595446400.

The previous prime is 211131120061. The next prime is 211131120103. The reversal of 211131120100 is 1021131112.

It is a happy number.

211131120100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (211131120103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42814635 + ... + 42819565.

It is an arithmetic number, because the mean of its divisors is an integer number (6427885464).

Almost surely, 2^211131120100 is an apocalyptic number.

211131120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211131120100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231403876704).

211131120100 is an abundant number, since it is smaller than the sum of its proper divisors (251676633308).

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

211131120100 is a wasteful number, since it uses less digits than its factorization.

211131120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9205 (or 9198 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 211131120100 its reverse (1021131112), we get a palindrome (212152251212).

The spelling of 211131120100 in words is "two hundred eleven billion, one hundred thirty-one million, one hundred twenty thousand, one hundred".