201220122222111 has 16 divisors (see below), whose sum is σ = 269285714520416. Its totient is φ = 133651069134336.

The previous prime is 201220122222103. The next prime is 201220122222113. The reversal of 201220122222111 is 111222221022102.

201220122222111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201220122222111 - 2³ = 201220122222103 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 (201220122222113) 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, 51889720 + ... + 55632573.

It is an arithmetic number, because the mean of its divisors is an integer number (16830357157526).

Almost surely, 2^{201220122222111} is an apocalyptic number.

201220122222111 is a deficient number, since it is larger than the sum of its proper divisors (68065592298305).

201220122222111 is a wasteful number, since it uses less digits than its factorization.

201220122222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107524602.

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

Adding to 201220122222111 its reverse (111222221022102), we get a palindrome (312442343244213).

The spelling of 201220122222111 in words is "two hundred one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred eleven".