321221201010000 has 400 divisors, whose sum is σ = 1038699723891456. Its totient is φ = 85514153984000.

The previous prime is 321221201009957. The next prime is 321221201010001. The reversal of 321221201010000 is 10102122123.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321221201010001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 64985067529 + ... + 64985072471.

Almost surely, 2^{321221201010000} is an apocalyptic number.

321221201010000 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 321221201010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519349861945728).

321221201010000 is an abundant number, since it is smaller than the sum of its proper divisors (717478522881456).

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

321221201010000 is a wasteful number, since it uses less digits than its factorization.

321221201010000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8200 (or 8179 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 321221201010000 its reverse (10102122123), we get a palindrome (321231303132123).

The spelling of 321221201010000 in words is "three hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, ten thousand".