320121120020 has 96 divisors (see below), whose sum is σ = 739659368448. Its totient is φ = 115638400512.

The previous prime is 320121119977. The next prime is 320121120061. The reversal of 320121120020 is 20021121023.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 320121119977 and 320121120004.

It is a congruent number.

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, 58445522 + ... + 58450998.

It is an arithmetic number, because the mean of its divisors is an integer number (7704785088).

Almost surely, 2^320121120020 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 320121120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369829684224).

320121120020 is an abundant number, since it is smaller than the sum of its proper divisors (419538248428).

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

320121120020 is a wasteful number, since it uses less digits than its factorization.

320121120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10329 (or 10327 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 320121120020 its reverse (20021121023), we get a palindrome (340142241043).

The spelling of 320121120020 in words is "three hundred twenty billion, one hundred twenty-one million, one hundred twenty thousand, twenty".