221100210221200 has 120 divisors (see below), whose sum is σ = 535089790588320. Its totient is φ = 87791383680000.

The previous prime is 221100210221159. The next prime is 221100210221207. The reversal of 221100210221200 is 2122012001122.

It is a happy number.

221100210221200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (221100210221207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2061467575 + ... + 2061574825.

It is an arithmetic number, because the mean of its divisors is an integer number (4459081588236).

Almost surely, 2^{221100210221200} is an apocalyptic number.

221100210221200 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 221100210221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267544895294160).

221100210221200 is an abundant number, since it is smaller than the sum of its proper divisors (313989580367120).

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

221100210221200 is a wasteful number, since it uses less digits than its factorization.

221100210221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145025 (or 145014 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221100210221200 its reverse (2122012001122), we get a palindrome (223222222222322).

The spelling of 221100210221200 in words is "two hundred twenty-one trillion, one hundred billion, two hundred ten million, two hundred twenty-one thousand, two hundred".