2001101221050 has 192 divisors, whose sum is σ = 5086422376704. Its totient is φ = 520487884800.

The previous prime is 2001101220997. The next prime is 2001101221051. The reversal of 2001101221050 is 501221011002.

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

It is not an unprimeable number, because it can be changed into a prime (2001101221051) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 929446774 + ... + 929448926.

It is an arithmetic number, because the mean of its divisors is an integer number (26491783212).

Almost surely, 2^{2001101221050} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001101221050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2543211188352).

2001101221050 is an abundant number, since it is smaller than the sum of its proper divisors (3085321155654).

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

2001101221050 is a wasteful number, since it uses less digits than its factorization.

2001101221050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033 (or 3028 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 2001101221050 its reverse (501221011002), we get a palindrome (2502322232052).

The spelling of 2001101221050 in words is "two trillion, one billion, one hundred one million, two hundred twenty-one thousand, fifty".