321404224020020 has 24 divisors (see below), whose sum is σ = 684455192563968. Its totient is φ = 126750961584800.

The previous prime is 321404224020001. The next prime is 321404224020023. The reversal of 321404224020020 is 20020422404123.

It is a super-2 number, since 2×321404224020020² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321404224020023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113170499996 + ... + 113170502835.

It is an arithmetic number, because the mean of its divisors is an integer number (28518966356832).

Almost surely, 2^{321404224020020} is an apocalyptic number.

It is an amenable number.

321404224020020 is an abundant number, since it is smaller than the sum of its proper divisors (363050968543948).

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

321404224020020 is a wasteful number, since it uses less digits than its factorization.

321404224020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226341002911 (or 226341002909 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 321404224020020 its reverse (20020422404123), we get a palindrome (341424646424143).

The spelling of 321404224020020 in words is "three hundred twenty-one trillion, four hundred four billion, two hundred twenty-four million, twenty thousand, twenty".