321221121030 has 96 divisors (see below), whose sum is σ = 847872511200. Its totient is φ = 84357351936.

The previous prime is 321221121019. The next prime is 321221121059. The reversal of 321221121030 is 30121122123.

321221121030 is a `hidden beast` number, since 3 + 212 + 211 + 210 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 321221120994 and 321221121012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43587186 + ... + 43594554.

It is an arithmetic number, because the mean of its divisors is an integer number (8832005325).

Almost surely, 2^321221121030 is an apocalyptic number.

321221121030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 321221121030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423936255600).

321221121030 is an abundant number, since it is smaller than the sum of its proper divisors (526651390170).

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

321221121030 is a wasteful number, since it uses less digits than its factorization.

321221121030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14678 (or 14675 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 321221121030 its reverse (30121122123), we get a palindrome (351342243153).

The spelling of 321221121030 in words is "three hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, thirty".