211411220 has 48 divisors (see below), whose sum is σ = 456382080. Its totient is φ = 82217856.

The previous prime is 211411153. The next prime is 211411231. The reversal of 211411220 is 22114112.

It is a happy number.

211411220 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

211411220 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 211411195 and 211411204.

It is a congruent number.

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, 251561 + ... + 252399.

It is an arithmetic number, because the mean of its divisors is an integer number (9507960).

Almost surely, 2^211411220 is an apocalyptic number.

211411220 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 211411220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228191040).

211411220 is an abundant number, since it is smaller than the sum of its proper divisors (244970860).

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

211411220 is a wasteful number, since it uses less digits than its factorization.

211411220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 1182 counting only the distinct ones).

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

The square root of 211411220 is about 14539.9869325939. The cubic root of 211411220 is about 595.7206812417.

Adding to 211411220 its reverse (22114112), we get a palindrome (233525332).

The spelling of 211411220 in words is "two hundred eleven million, four hundred eleven thousand, two hundred twenty".