2121201212211 has 12 divisors (see below), whose sum is σ = 3064144791240. Its totient is φ = 1414047610080.

The previous prime is 2121201212191. The next prime is 2121201212231. The reversal of 2121201212211 is 1122121021212.

2121201212211 is a `hidden beast` number, since 21 + 21 + 201 + 212 + 211 = 666.

It is an interprime number because it is at equal distance from previous prime (2121201212191) and next prime (2121201212231).

It is not a de Polignac number, because 2121201212211 - 2¹⁵ = 2121201179443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121201212231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7055521 + ... + 7350018.

It is an arithmetic number, because the mean of its divisors is an integer number (255345399270).

Almost surely, 2^{2121201212211} is an apocalyptic number.

2121201212211 is a deficient number, since it is larger than the sum of its proper divisors (942943579029).

2121201212211 is a wasteful number, since it uses less digits than its factorization.

2121201212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14421906 (or 14421903 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2121201212211 its reverse (1122121021212), we get a palindrome (3243322233423).

The spelling of 2121201212211 in words is "two trillion, one hundred twenty-one billion, two hundred one million, two hundred twelve thousand, two hundred eleven".