201211011100221 has 8 divisors (see below), whose sum is σ = 268281417551520. Its totient is φ = 134140639357872.

The previous prime is 201211011100201. The next prime is 201211011100279. The reversal of 201211011100221 is 122001110112102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201211011100221 - 2¹⁷ = 201211010969149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201211011100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211011100201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11655906 + ... + 23200908.

It is an arithmetic number, because the mean of its divisors is an integer number (33535177193940).

Almost surely, 2^{201211011100221} is an apocalyptic number.

It is an amenable number.

201211011100221 is a deficient number, since it is larger than the sum of its proper divisors (67070406451299).

201211011100221 is a wasteful number, since it uses less digits than its factorization.

201211011100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17354475.

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

Adding to 201211011100221 its reverse (122001110112102), we get a palindrome (323212121212323).

The spelling of 201211011100221 in words is "two hundred one trillion, two hundred eleven billion, eleven million, one hundred thousand, two hundred twenty-one".