201101221222221 has 16 divisors (see below), whose sum is σ = 269640600477248. Its totient is φ = 133314794524800.

The previous prime is 201101221222183. The next prime is 201101221222241. The reversal of 201101221222221 is 122222122101102.

It is not a de Polignac number, because 201101221222221 - 2¹⁹ = 201101220697933 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 (201101221222241) 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, 10591936 + ... + 22680201.

It is an arithmetic number, because the mean of its divisors is an integer number (16852537529828).

Almost surely, 2^{201101221222221} is an apocalyptic number.

It is an amenable number.

201101221222221 is a deficient number, since it is larger than the sum of its proper divisors (68539379255027).

201101221222221 is a wasteful number, since it uses less digits than its factorization.

201101221222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33283452.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 201101221222221 its reverse (122222122101102), we get a palindrome (323323343323323).

The spelling of 201101221222221 in words is "two hundred one trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".