321221233020 has 96 divisors (see below), whose sum is σ = 921553790976. Its totient is φ = 83551859200.

The previous prime is 321221232929. The next prime is 321221233051. The reversal of 321221233020 is 20332122123.

It is a happy number.

It is a super-3 number, since 3×321221233020³ (a number of 35 digits) contains 333 as substring.

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, 14569405 + ... + 14591435.

It is an arithmetic number, because the mean of its divisors is an integer number (9599518656).

Almost surely, 2^321221233020 is an apocalyptic number.

321221233020 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 321221233020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460776895488).

321221233020 is an abundant number, since it is smaller than the sum of its proper divisors (600332557956).

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

321221233020 is a wasteful number, since it uses less digits than its factorization.

321221233020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28011 (or 28009 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 321221233020 its reverse (20332122123), we get a palindrome (341553355143).

The spelling of 321221233020 in words is "three hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-three thousand, twenty".