211323202220 has 48 divisors (see below), whose sum is σ = 479197044480. Its totient is φ = 77817805056.

The previous prime is 211323202213. The next prime is 211323202247. The reversal of 211323202220 is 22202323112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211323202192 and 211323202201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 992540 + ... + 1186499.

It is an arithmetic number, because the mean of its divisors is an integer number (9983271760).

Almost surely, 2^211323202220 is an apocalyptic number.

211323202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211323202220 is an abundant number, since it is smaller than the sum of its proper divisors (267873842260).

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

211323202220 is a wasteful number, since it uses less digits than its factorization.

211323202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179434 (or 2179432 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 211323202220 its reverse (22202323112), we get a palindrome (233525525332).

The spelling of 211323202220 in words is "two hundred eleven billion, three hundred twenty-three million, two hundred two thousand, two hundred twenty".