320122213220 has 48 divisors (see below), whose sum is σ = 680655549168. Its totient is φ = 126457282560.

The previous prime is 320122213079. The next prime is 320122213247. The reversal of 320122213220 is 22312221023.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 115832676964 + 204289536256 = 340342^2 + 451984^2 .

It is a super-2 number, since 2×320122213220² (a number of 24 digits) contains 22 as substring.

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 = 320122213192 and 320122213201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370340 + ... + 881700.

It is an arithmetic number, because the mean of its divisors is an integer number (14180323941).

Almost surely, 2^320122213220 is an apocalyptic number.

It is an amenable number.

320122213220 is an abundant number, since it is smaller than the sum of its proper divisors (360533335948).

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

320122213220 is a wasteful number, since it uses less digits than its factorization.

320122213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511760 (or 511758 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 320122213220 its reverse (22312221023), we get a palindrome (342434434243).

The spelling of 320122213220 in words is "three hundred twenty billion, one hundred twenty-two million, two hundred thirteen thousand, two hundred twenty".