211220010220 has 48 divisors (see below), whose sum is σ = 445198860288. Its totient is φ = 84176487360.

The previous prime is 211220010193. The next prime is 211220010229. The reversal of 211220010220 is 22010022112.

It is a happy number.

211220010220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211220010220² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211220010220.

It is not an unprimeable number, because it can be changed into a prime (211220010229) 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, 15561877 + ... + 15575443.

It is an arithmetic number, because the mean of its divisors is an integer number (9274976256).

Almost surely, 2^211220010220 is an apocalyptic number.

211220010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220010220 is an abundant number, since it is smaller than the sum of its proper divisors (233978850068).

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

211220010220 is a wasteful number, since it uses less digits than its factorization.

211220010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16390 (or 16388 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 211220010220 its reverse (22010022112), we get a palindrome (233230032332).

The spelling of 211220010220 in words is "two hundred eleven billion, two hundred twenty million, ten thousand, two hundred twenty".