211021021220 has 48 divisors (see below), whose sum is σ = 444226809600. Its totient is φ = 84202444800.

The previous prime is 211021021213. The next prime is 211021021229. The reversal of 211021021220 is 22120120112.

211021021220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 211021021195 and 211021021204.

It is not an unprimeable number, because it can be changed into a prime (211021021229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14646020 + ... + 14660420.

It is an arithmetic number, because the mean of its divisors is an integer number (9254725200).

Almost surely, 2^211021021220 is an apocalyptic number.

211021021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021021220 is an abundant number, since it is smaller than the sum of its proper divisors (233205788380).

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

211021021220 is a wasteful number, since it uses less digits than its factorization.

211021021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16148 (or 16146 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211021021220 its reverse (22120120112), we get a palindrome (233141141332).

The spelling of 211021021220 in words is "two hundred eleven billion, twenty-one million, twenty-one thousand, two hundred twenty".