320120100220 has 12 divisors (see below), whose sum is σ = 672252210504. Its totient is φ = 128048040080.

The previous prime is 320120100187. The next prime is 320120100277. The reversal of 320120100220 is 22001021023.

It is a self number, because there is not a number n which added to its sum of digits gives 320120100220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8003002486 + ... + 8003002525.

It is an arithmetic number, because the mean of its divisors is an integer number (56021017542).

Almost surely, 2^320120100220 is an apocalyptic number.

It is an amenable number.

320120100220 is an abundant number, since it is smaller than the sum of its proper divisors (352132110284).

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

320120100220 is a wasteful number, since it uses less digits than its factorization.

320120100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16006005020 (or 16006005018 counting only the distinct ones).

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

Adding to 320120100220 its reverse (22001021023), we get a palindrome (342121121243).

The spelling of 320120100220 in words is "three hundred twenty billion, one hundred twenty million, one hundred thousand, two hundred twenty".