201211210111211 has 2 divisors, whose sum is σ = 201211210111212. Its totient is φ = 201211210111210.

The previous prime is 201211210111103. The next prime is 201211210111259. The reversal of 201211210111211 is 112111012112102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201211210111211 - 2³⁴ = 201194030242027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201211210111211.

It is not a weakly prime, because it can be changed into another prime (201211210101211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605605055605 + 100605605055606.

It is an arithmetic number, because the mean of its divisors is an integer number (100605605055606).

Almost surely, 2^{201211210111211} is an apocalyptic number.

201211210111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211210111211 is an equidigital number, since it uses as much as digits as its factorization.

201211210111211 is an evil number, because the sum of its binary digits is even.

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

Adding to 201211210111211 its reverse (112111012112102), we get a palindrome (313322222223313).

The spelling of 201211210111211 in words is "two hundred one trillion, two hundred eleven billion, two hundred ten million, one hundred eleven thousand, two hundred eleven".