211021210220 has 24 divisors (see below), whose sum is σ = 443241427104. Its totient is φ = 84390029696.

The previous prime is 211021210207. The next prime is 211021210249. The reversal of 211021210220 is 22012120112.

211021210220 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 = 211021210195 and 211021210204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059449 + ... + 1242768.

It is an arithmetic number, because the mean of its divisors is an integer number (18468392796).

Almost surely, 2^211021210220 is an apocalyptic number.

211021210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021210220 is an abundant number, since it is smaller than the sum of its proper divisors (232220216884).

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

211021210220 is a wasteful number, since it uses less digits than its factorization.

211021210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306809 (or 2306807 counting only the distinct ones).

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

Adding to 211021210220 its reverse (22012120112), we get a palindrome (233033330332).

The spelling of 211021210220 in words is "two hundred eleven billion, twenty-one million, two hundred ten thousand, two hundred twenty".