321113220020 has 12 divisors (see below), whose sum is σ = 674337762084. Its totient is φ = 128445288000.

The previous prime is 321113220011. The next prime is 321113220023. The reversal of 321113220020 is 20022311123.

It can be written as a sum of positive squares in 2 ways, for example, as 136672174864 + 184441045156 = 369692^2 + 429466^2 .

It is a super-3 number, since 3×321113220020³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321113220023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8027830481 + ... + 8027830520.

It is an arithmetic number, because the mean of its divisors is an integer number (56194813507).

Almost surely, 2^321113220020 is an apocalyptic number.

It is an amenable number.

321113220020 is an abundant number, since it is smaller than the sum of its proper divisors (353224542064).

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

321113220020 is a wasteful number, since it uses less digits than its factorization.

321113220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16055661010 (or 16055661008 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 321113220020 its reverse (20022311123), we get a palindrome (341135531143).

The spelling of 321113220020 in words is "three hundred twenty-one billion, one hundred thirteen million, two hundred twenty thousand, twenty".