212120320 has 36 divisors (see below), whose sum is σ = 508097520. Its totient is φ = 84847616.

The previous prime is 212120291. The next prime is 212120327. The reversal of 212120320 is 23021212.

It is a self number, because there is not a number n which added to its sum of digits gives 212120320.

It is not an unprimeable number, because it can be changed into a prime (212120327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81580 + ... + 84139.

It is an arithmetic number, because the mean of its divisors is an integer number (14113820).

Almost surely, 2^212120320 is an apocalyptic number.

212120320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212120320 is an abundant number, since it is smaller than the sum of its proper divisors (295977200).

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

212120320 is an equidigital number, since it uses as much as digits as its factorization.

212120320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165740 (or 165726 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212120320 is about 14564.3509982422. The cubic root of 212120320 is about 596.3859788287.

Adding to 212120320 its reverse (23021212), we get a palindrome (235141532).

The spelling of 212120320 in words is "two hundred twelve million, one hundred twenty thousand, three hundred twenty".