201211210112111 has 4 divisors (see below), whose sum is σ = 204214362501912. Its totient is φ = 198208057722312.

The previous prime is 201211210112069. The next prime is 201211210112123. The reversal of 201211210112111 is 111211012112102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 201211210112111 - 2²² = 201211205917807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201211210112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211210112411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1501576194800 + ... + 1501576194933.

It is an arithmetic number, because the mean of its divisors is an integer number (51053590625478).

Almost surely, 2^{201211210112111} is an apocalyptic number.

201211210112111 is a deficient number, since it is larger than the sum of its proper divisors (3003152389801).

201211210112111 is an equidigital number, since it uses as much as digits as its factorization.

201211210112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003152389800.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 201211210112111 its reverse (111211012112102), we get a palindrome (312422222224213).

The spelling of 201211210112111 in words is "two hundred one trillion, two hundred eleven billion, two hundred ten million, one hundred twelve thousand, one hundred eleven".