211021000120 has 64 divisors (see below), whose sum is σ = 542673331200. Its totient is φ = 72343670400.

The previous prime is 211021000109. The next prime is 211021000129. The reversal of 211021000120 is 21000120112.

211021000120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 211021000097 and 211021000106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021000129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4028095 + ... + 4080145.

It is an arithmetic number, because the mean of its divisors is an integer number (8479270800).

Almost surely, 2^211021000120 is an apocalyptic number.

211021000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021000120 is an abundant number, since it is smaller than the sum of its proper divisors (331652331080).

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

211021000120 is a wasteful number, since it uses less digits than its factorization.

211021000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66548 (or 66544 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 211021000120 its reverse (21000120112), we get a palindrome (232021120232).

The spelling of 211021000120 in words is "two hundred eleven billion, twenty-one million, one hundred twenty", and thus it is an aban number.