21322330021200 has 240 divisors, whose sum is σ = 73726471273280. Its totient is φ = 5236450467840.

The previous prime is 21322330021199. The next prime is 21322330021271. The reversal of 21322330021200 is 212003322312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

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, 5176491 + ... + 8333109.

Almost surely, 2^{21322330021200} is an apocalyptic number.

21322330021200 is a gapful number since it is divisible by the number (20) 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 21322330021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36863235636640).

21322330021200 is an abundant number, since it is smaller than the sum of its proper divisors (52404141252080).

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

21322330021200 is a wasteful number, since it uses less digits than its factorization.

21322330021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157086 (or 3157075 counting only the distinct ones).

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

Adding to 21322330021200 its reverse (212003322312), we get a palindrome (21534333343512).

The spelling of 21322330021200 in words is "twenty-one trillion, three hundred twenty-two billion, three hundred thirty million, twenty-one thousand, two hundred".