212341220 has 96 divisors (see below), whose sum is σ = 581188608. Its totient is φ = 63240192.

The previous prime is 212341189. The next prime is 212341247. The reversal of 212341220 is 22143212.

It is a super-2 number, since 2×212341220² = 90177587422176800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27509 + ... + 34371.

It is an arithmetic number, because the mean of its divisors is an integer number (6054048).

Almost surely, 2^212341220 is an apocalyptic number.

212341220 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 212341220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290594304).

212341220 is an abundant number, since it is smaller than the sum of its proper divisors (368847388).

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

212341220 is a wasteful number, since it uses less digits than its factorization.

212341220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6909 (or 6907 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212341220 is about 14571.9326103300. The cubic root of 212341220 is about 596.5929304897.

Adding to 212341220 its reverse (22143212), we get a palindrome (234484432).

The spelling of 212341220 in words is "two hundred twelve million, three hundred forty-one thousand, two hundred twenty".