321224020120 has 64 divisors (see below), whose sum is σ = 733766065920. Its totient is φ = 126533092224.

The previous prime is 321224020069. The next prime is 321224020133. The reversal of 321224020120 is 21020422123.

It is a super-2 number, since 2×321224020120² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9693099 + ... + 9726181.

It is an arithmetic number, because the mean of its divisors is an integer number (11465094780).

Almost surely, 2^321224020120 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 321224020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366883032960).

321224020120 is an abundant number, since it is smaller than the sum of its proper divisors (412542045800).

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

321224020120 is a wasteful number, since it uses less digits than its factorization.

321224020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36784 (or 36780 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 321224020120 its reverse (21020422123), we get a palindrome (342244442243).

The spelling of 321224020120 in words is "three hundred twenty-one billion, two hundred twenty-four million, twenty thousand, one hundred twenty".