201111201021222 has 128 divisors (see below), whose sum is σ = 450830203084800. Its totient is φ = 66452178124800.

The previous prime is 201111201021217. The next prime is 201111201021271. The reversal of 201111201021222 is 222120102111102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201111201021195 and 201111201021204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24321098904 + ... + 24321107172.

It is an arithmetic number, because the mean of its divisors is an integer number (3522110961600).

Almost surely, 2^{201111201021222} is an apocalyptic number.

201111201021222 is an abundant number, since it is smaller than the sum of its proper divisors (249719002063578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201111201021222 is a wasteful number, since it uses less digits than its factorization.

201111201021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16459 (or 16453 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201111201021222 its reverse (222120102111102), we get a palindrome (423231303132324).

The spelling of 201111201021222 in words is "two hundred one trillion, one hundred eleven billion, two hundred one million, twenty-one thousand, two hundred twenty-two".