321020120020 has 48 divisors (see below), whose sum is σ = 692431367040. Its totient is φ = 124925099904.

The previous prime is 321020120009. The next prime is 321020120027. The reversal of 321020120020 is 20021020123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321020120027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11668641 + ... + 11696119.

It is an arithmetic number, because the mean of its divisors is an integer number (14425653480).

Almost surely, 2^321020120020 is an apocalyptic number.

It is an amenable number.

321020120020 is an abundant number, since it is smaller than the sum of its proper divisors (371411247020).

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

321020120020 is a wasteful number, since it uses less digits than its factorization.

321020120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43312 (or 43310 counting only the distinct ones).

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

Adding to 321020120020 its reverse (20021020123), we get a palindrome (341041140143).

The spelling of 321020120020 in words is "three hundred twenty-one billion, twenty million, one hundred twenty thousand, twenty".