211323030110220 has 192 divisors, whose sum is σ = 687442196883456. Its totient is φ = 47502082437120.

The previous prime is 211323030110161. The next prime is 211323030110239. The reversal of 211323030110220 is 22011030323112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 143327812 + ... + 144794708.

It is an arithmetic number, because the mean of its divisors is an integer number (3580428108768).

Almost surely, 2^{211323030110220} is an apocalyptic number.

211323030110220 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 211323030110220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343721098441728).

211323030110220 is an abundant number, since it is smaller than the sum of its proper divisors (476119166773236).

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

211323030110220 is a wasteful number, since it uses less digits than its factorization.

211323030110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472600 (or 1472598 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 211323030110220 its reverse (22011030323112), we get a palindrome (233334060433332).

The spelling of 211323030110220 in words is "two hundred eleven trillion, three hundred twenty-three billion, thirty million, one hundred ten thousand, two hundred twenty".