321204344012220 has 48 divisors (see below), whose sum is σ = 899595499436928. Its totient is φ = 85633221622080.

The previous prime is 321204344012197. The next prime is 321204344012273. The reversal of 321204344012220 is 22210443402123.

It is a super-2 number, since 2×321204344012220² (a number of 30 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 664447446 + ... + 664930685.

It is an arithmetic number, because the mean of its divisors is an integer number (18741572904936).

Almost surely, 2^{321204344012220} is an apocalyptic number.

321204344012220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321204344012220 is an abundant number, since it is smaller than the sum of its proper divisors (578391155424708).

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

321204344012220 is a wasteful number, since it uses less digits than its factorization.

321204344012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329382170 (or 1329382168 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 321204344012220 its reverse (22210443402123), we get a palindrome (343414787414343).

The spelling of 321204344012220 in words is "three hundred twenty-one trillion, two hundred four billion, three hundred forty-four million, twelve thousand, two hundred twenty".