201211110221 has 16 divisors (see below), whose sum is σ = 220322229120. Its totient is φ = 182237647680.

The previous prime is 201211110211. The next prime is 201211110239. The reversal of 201211110221 is 122011112102.

It is a de Polignac number, because none of the positive numbers 2^k-201211110221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201211110196 and 201211110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211110211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3636455 + ... + 3691371.

It is an arithmetic number, because the mean of its divisors is an integer number (13770139320).

Almost surely, 2^201211110221 is an apocalyptic number.

It is an amenable number.

201211110221 is a deficient number, since it is larger than the sum of its proper divisors (19111118899).

201211110221 is a wasteful number, since it uses less digits than its factorization.

201211110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56164.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201211110221 its reverse (122011112102), we get a palindrome (323222222323).

The spelling of 201211110221 in words is "two hundred one billion, two hundred eleven million, one hundred ten thousand, two hundred twenty-one".