201220110 has 192 divisors, whose sum is σ = 654151680. Its totient is φ = 41783040.

The previous prime is 201220073. The next prime is 201220199. The reversal of 201220110 is 11022102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 201220092 and 201220101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 646855 + ... + 647165.

It is an arithmetic number, because the mean of its divisors is an integer number (3407040).

Almost surely, 2^201220110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201220110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327075840).

201220110 is an abundant number, since it is smaller than the sum of its proper divisors (452931570).

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

201220110 is a wasteful number, since it uses less digits than its factorization.

201220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 201220110 is about 14185.2074359172. The cubic root of 201220110 is about 585.9903452924.

Adding to 201220110 its reverse (11022102), we get a palindrome (212242212).

It can be divided in two parts, 2012 and 20110, that added together give a palindrome (22122).

The spelling of 201220110 in words is "two hundred one million, two hundred twenty thousand, one hundred ten".