201011101221210 has 128 divisors (see below), whose sum is σ = 570407917708800. Its totient is φ = 44357080965120.

The previous prime is 201011101221187. The next prime is 201011101221211. The reversal of 201011101221210 is 12122101110102.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 201011101221210.

It is not an unprimeable number, because it can be changed into a prime (201011101221211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66491826 + ... + 69449154.

It is an arithmetic number, because the mean of its divisors is an integer number (4456311857100).

Almost surely, 2^{201011101221210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201011101221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285203958854400).

201011101221210 is an abundant number, since it is smaller than the sum of its proper divisors (369396816487590).

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

201011101221210 is a wasteful number, since it uses less digits than its factorization.

201011101221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2968536.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201011101221210 its reverse (12122101110102), we get a palindrome (213133202331312).

The spelling of 201011101221210 in words is "two hundred one trillion, eleven billion, one hundred one million, two hundred twenty-one thousand, two hundred ten".