212216120 has 32 divisors (see below), whose sum is σ = 483537600. Its totient is φ = 83810688.

The previous prime is 212216119. The next prime is 212216129. The reversal of 212216120 is 21612212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212216129) 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, 30419 + ... + 36738.

It is an arithmetic number, because the mean of its divisors is an integer number (15110550).

Almost surely, 2^212216120 is an apocalyptic number.

212216120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212216120 is an abundant number, since it is smaller than the sum of its proper divisors (271321480).

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

212216120 is a wasteful number, since it uses less digits than its factorization.

212216120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67247 (or 67243 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 212216120 is about 14567.6394793391. The cubic root of 212216120 is about 596.4757473428.

Adding to 212216120 its reverse (21612212), we get a palindrome (233828332).

The spelling of 212216120 in words is "two hundred twelve million, two hundred sixteen thousand, one hundred twenty".