201221200110 has 256 divisors, whose sum is σ = 577465417728. Its totient is φ = 43925952000.

The previous prime is 201221200091. The next prime is 201221200151. The reversal of 201221200110 is 11002122102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 70776349 + ... + 70779191.

It is an arithmetic number, because the mean of its divisors is an integer number (2255724288).

Almost surely, 2^201221200110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201221200110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288732708864).

201221200110 is an abundant number, since it is smaller than the sum of its proper divisors (376244217618).

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

201221200110 is a wasteful number, since it uses less digits than its factorization.

201221200110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201221200110 its reverse (11002122102), we get a palindrome (212223322212).

The spelling of 201221200110 in words is "two hundred one billion, two hundred twenty-one million, two hundred thousand, one hundred ten".