201111011020221 has 32 divisors (see below), whose sum is σ = 270650500454400. Its totient is φ = 132829028380224.

The previous prime is 201111011020189. The next prime is 201111011020223. The reversal of 201111011020221 is 122020110111102.

It is a happy number.

It is not a de Polignac number, because 201111011020221 - 2⁵ = 201111011020189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201111011020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111011020223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 326746455 + ... + 327361371.

It is an arithmetic number, because the mean of its divisors is an integer number (8457828139200).

Almost surely, 2^{201111011020221} is an apocalyptic number.

It is an amenable number.

201111011020221 is a deficient number, since it is larger than the sum of its proper divisors (69539489434179).

201111011020221 is a wasteful number, since it uses less digits than its factorization.

201111011020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617465.

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

Adding to 201111011020221 its reverse (122020110111102), we get a palindrome (323131121131323).

The spelling of 201111011020221 in words is "two hundred one trillion, one hundred eleven billion, eleven million, twenty thousand, two hundred twenty-one".