211000000120 has 128 divisors (see below), whose sum is σ = 586044950400. Its totient is φ = 66579480576.

The previous prime is 211000000109. The next prime is 211000000129. The reversal of 211000000120 is 21000000112.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211000000129) 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 31 ways as a sum of consecutive naturals, for example, 1140676 + ... + 1312684.

It is an arithmetic number, because the mean of its divisors is an integer number (4578476175).

Almost surely, 2^211000000120 is an apocalyptic number.

211000000120 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 211000000120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293022475200).

211000000120 is an abundant number, since it is smaller than the sum of its proper divisors (375044950280).

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

211000000120 is a wasteful number, since it uses less digits than its factorization.

211000000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172377 (or 172373 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 211000000120 its reverse (21000000112), we get a palindrome (232000000232).

The spelling of 211000000120 in words is "two hundred eleven billion, one hundred twenty", and thus it is an aban number.