320212222220 has 96 divisors (see below), whose sum is σ = 738506970432. Its totient is φ = 115660800000.

The previous prime is 320212222217. The next prime is 320212222247. The reversal of 320212222220 is 22222212023.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 320212222192 and 320212222201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21253490 + ... + 21268550.

It is an arithmetic number, because the mean of its divisors is an integer number (7692780942).

Almost surely, 2^320212222220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320212222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369253485216).

320212222220 is an abundant number, since it is smaller than the sum of its proper divisors (418294748212).

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

320212222220 is a wasteful number, since it uses less digits than its factorization.

320212222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15723 (or 15721 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 320212222220 its reverse (22222212023), we get a palindrome (342434434243).

The spelling of 320212222220 in words is "three hundred twenty billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty".