321121323020 has 36 divisors (see below), whose sum is σ = 680716545600. Its totient is φ = 127247984928.

The previous prime is 321121323007. The next prime is 321121323037. The reversal of 321121323020 is 20323121123.

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 = 321121322983 and 321121323001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472220 + ... + 930179.

Almost surely, 2^321121323020 is an apocalyptic number.

It is an amenable number.

321121323020 is an abundant number, since it is smaller than the sum of its proper divisors (359595222580).

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

321121323020 is a wasteful number, since it uses less digits than its factorization.

321121323020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402622 (or 1402513 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 321121323020 its reverse (20323121123), we get a palindrome (341444444143).

The spelling of 321121323020 in words is "three hundred twenty-one billion, one hundred twenty-one million, three hundred twenty-three thousand, twenty".