211111202222201 has 16 divisors (see below), whose sum is σ = 215704525994496. Its totient is φ = 206563780596096.

The previous prime is 211111202222197. The next prime is 211111202222203. The reversal of 211111202222201 is 102222202111112.

It is a cyclic number.

It is not a de Polignac number, because 211111202222201 - 2² = 211111202222197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211111202222203) 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, 5163236 + ... + 21186821.

It is an arithmetic number, because the mean of its divisors is an integer number (13481532874656).

Almost surely, 2^{211111202222201} is an apocalyptic number.

It is an amenable number.

211111202222201 is a deficient number, since it is larger than the sum of its proper divisors (4593323772295).

211111202222201 is a wasteful number, since it uses less digits than its factorization.

211111202222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26350928.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211111202222201 its reverse (102222202111112), we get a palindrome (313333404333313).

The spelling of 211111202222201 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred two million, two hundred twenty-two thousand, two hundred one".