211000222020 has 144 divisors (see below), whose sum is σ = 689208162048. Its totient is φ = 48091760640.

The previous prime is 211000221997. The next prime is 211000222021. The reversal of 211000222020 is 20222000112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 211000221987 and 211000222005.

It is not an unprimeable number, because it can be changed into a prime (211000222021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 936165 + ... + 1139475.

It is an arithmetic number, because the mean of its divisors is an integer number (4786167792).

Almost surely, 2^211000222020 is an apocalyptic number.

211000222020 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 211000222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344604081024).

211000222020 is an abundant number, since it is smaller than the sum of its proper divisors (478207940028).

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

211000222020 is a wasteful number, since it uses less digits than its factorization.

211000222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203690 (or 203681 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 211000222020 its reverse (20222000112), we get a palindrome (231222222132).

The spelling of 211000222020 in words is "two hundred eleven billion, two hundred twenty-two thousand, twenty".