201211212220211 has 4 divisors (see below), whose sum is σ = 201937606488432. Its totient is φ = 200484817951992.

The previous prime is 201211212220163. The next prime is 201211212220219. The reversal of 201211212220211 is 112022212112102.

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

It is a cyclic number.

It is not a de Polignac number, because 201211212220211 - 2⁴⁶ = 130842468042547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201211212220219) 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, 363197133695 + ... + 363197134248.

It is an arithmetic number, because the mean of its divisors is an integer number (50484401622108).

Almost surely, 2^{201211212220211} is an apocalyptic number.

201211212220211 is a deficient number, since it is larger than the sum of its proper divisors (726394268221).

201211212220211 is an equidigital number, since it uses as much as digits as its factorization.

201211212220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726394268220.

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

Adding to 201211212220211 its reverse (112022212112102), we get a palindrome (313233424332313).

The spelling of 201211212220211 in words is "two hundred one trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty thousand, two hundred eleven".