211423010220 has 288 divisors, whose sum is σ = 705090754368. Its totient is φ = 52995244032.

The previous prime is 211423010171. The next prime is 211423010221. The reversal of 211423010220 is 22010324112.

It is a happy number.

211423010220 is a `hidden beast` number, since 2 + 1 + 142 + 301 + 0 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211423010193 and 211423010202.

It is not an unprimeable number, because it can be changed into a prime (211423010221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 107157154 + ... + 107159126.

It is an arithmetic number, because the mean of its divisors is an integer number (2448231786).

Almost surely, 2^211423010220 is an apocalyptic number.

211423010220 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 211423010220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352545377184).

211423010220 is an abundant number, since it is smaller than the sum of its proper divisors (493667744148).

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

211423010220 is a wasteful number, since it uses less digits than its factorization.

211423010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311 (or 3297 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 211423010220 its reverse (22010324112), we get a palindrome (233433334332).

The spelling of 211423010220 in words is "two hundred eleven billion, four hundred twenty-three million, ten thousand, two hundred twenty".