201101221244 has 90 divisors (see below), whose sum is σ = 450326721600. Its totient is φ = 78350007120.

The previous prime is 201101221199. The next prime is 201101221253. The reversal of 201101221244 is 442122101102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2834597 + ... + 2904675.

It is an arithmetic number, because the mean of its divisors is an integer number (5003630240).

Almost surely, 2^201101221244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201101221244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225163360800).

201101221244 is an abundant number, since it is smaller than the sum of its proper divisors (249225500356).

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

201101221244 is an equidigital number, since it uses as much as digits as its factorization.

201101221244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70141 (or 70099 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 201101221244 its reverse (442122101102), we get a palindrome (643223322346).

The spelling of 201101221244 in words is "two hundred one billion, one hundred one million, two hundred twenty-one thousand, two hundred forty-four".