211220 has 24 divisors (see below), whose sum is σ = 453600. Its totient is φ = 82592.

The previous prime is 211219. The next prime is 211229. The reversal of 211220 is 22112.

It is a super-2 number, since 2×211220² = 89227776800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211198 and 211207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091 + ... + 1269.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2²¹¹²²⁰ is an apocalyptic number.

211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220 is an abundant number, since it is smaller than the sum of its proper divisors (242380).

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

211220 is a wasteful number, since it uses less digits than its factorization.

211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 211220 is about 459.5867709149. The cubic root of 211220 is about 59.5541018638.

Adding to 211220 its reverse (22112), we get a palindrome (233332).

The spelling of 211220 in words is "two hundred eleven thousand, two hundred twenty", and thus it is an iban number.