21201000322200 has 192 divisors, whose sum is σ = 67900139827200. Its totient is φ = 5466634060800.

The previous prime is 21201000322181. The next prime is 21201000322213. The reversal of 21201000322200 is 222300010212.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21201000322200.

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, 21712081 + ... + 22667519.

It is an arithmetic number, because the mean of its divisors is an integer number (353646561600).

Almost surely, 2^{21201000322200} is an apocalyptic number.

21201000322200 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 21201000322200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33950069913600).

21201000322200 is an abundant number, since it is smaller than the sum of its proper divisors (46699139505000).

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

21201000322200 is a wasteful number, since it uses less digits than its factorization.

21201000322200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956682 (or 956673 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21201000322200 its reverse (222300010212), we get a palindrome (21423300332412).

The spelling of 21201000322200 in words is "twenty-one trillion, two hundred one billion, three hundred twenty-two thousand, two hundred".