201221430000 has 200 divisors, whose sum is σ = 671971462800. Its totient is φ = 51808512000.

The previous prime is 201221429933. The next prime is 201221430017. The reversal of 201221430000 is 34122102.

It is a tau number, because it is divible by the number of its divisors (200).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 754356 + ... + 985644.

It is an arithmetic number, because the mean of its divisors is an integer number (3359857314).

Almost surely, 2^201221430000 is an apocalyptic number.

201221430000 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 201221430000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335985731400).

201221430000 is an abundant number, since it is smaller than the sum of its proper divisors (470750032800).

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

201221430000 is a wasteful number, since it uses less digits than its factorization.

201221430000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231349 (or 231328 counting only the distinct ones).

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

Adding to 201221430000 its reverse (34122102), we get a palindrome (201255552102).

The spelling of 201221430000 in words is "two hundred one billion, two hundred twenty-one million, four hundred thirty thousand".