321204032423220 has 96 divisors (see below), whose sum is σ = 905158746648576. Its totient is φ = 85103678160000.

The previous prime is 321204032423213. The next prime is 321204032423231. The reversal of 321204032423220 is 22324230402123.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15434565 + ... + 29675475.

It is an arithmetic number, because the mean of its divisors is an integer number (9428736944256).

Almost surely, 2^{321204032423220} is an apocalyptic number.

321204032423220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321204032423220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452579373324288).

321204032423220 is an abundant number, since it is smaller than the sum of its proper divisors (583954714225356).

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

321204032423220 is a wasteful number, since it uses less digits than its factorization.

321204032423220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14243341 (or 14243339 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 321204032423220 its reverse (22324230402123), we get a palindrome (343528262825343).

The spelling of 321204032423220 in words is "three hundred twenty-one trillion, two hundred four billion, thirty-two million, four hundred twenty-three thousand, two hundred twenty".