201110202122221 has 12 divisors (see below), whose sum is σ = 234009632235132. Its totient is φ = 172332196427328.

The previous prime is 201110202122183. The next prime is 201110202122257. The reversal of 201110202122221 is 122221202011102.

It can be written as a sum of positive squares in 2 ways, for example, as 82627281902025 + 118482920220196 = 9089955^2 + 10884986^2 .

It is not a de Polignac number, because 201110202122221 - 2²⁹ = 201109665251309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201110202122281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 570974770 + ... + 571326883.

It is an arithmetic number, because the mean of its divisors is an integer number (19500802686261).

Almost surely, 2^{201110202122221} is an apocalyptic number.

It is an amenable number.

201110202122221 is a deficient number, since it is larger than the sum of its proper divisors (32899430112911).

201110202122221 is a wasteful number, since it uses less digits than its factorization.

201110202122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142305260 (or 1142305253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201110202122221 its reverse (122221202011102), we get a palindrome (323331404133323).

The spelling of 201110202122221 in words is "two hundred one trillion, one hundred ten billion, two hundred two million, one hundred twenty-two thousand, two hundred twenty-one".