201101212111111 has 16 divisors (see below), whose sum is σ = 223801189587360. Its totient is φ = 179519670691200.

The previous prime is 201101212111109. The next prime is 201101212111133. The reversal of 201101212111111 is 111111212101102.

It is a cyclic number.

It is not a de Polignac number, because 201101212111111 - 2¹ = 201101212111109 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 (201108212111111) 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, 1780892656 + ... + 1781005573.

It is an arithmetic number, because the mean of its divisors is an integer number (13987574349210).

Almost surely, 2^{201101212111111} is an apocalyptic number.

201101212111111 is a deficient number, since it is larger than the sum of its proper divisors (22699977476249).

201101212111111 is a wasteful number, since it uses less digits than its factorization.

201101212111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561898386.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 201101212111111 its reverse (111111212101102), we get a palindrome (312212424212213).

The spelling of 201101212111111 in words is "two hundred one trillion, one hundred one billion, two hundred twelve million, one hundred eleven thousand, one hundred eleven".