2011221212211 has 12 divisors (see below), whose sum is σ = 2927273623560. Its totient is φ = 1330578918240.

The previous prime is 2011221212207. The next prime is 2011221212239. The reversal of 2011221212211 is 1122121221102.

2011221212211 is a `hidden beast` number, since 20 + 1 + 1 + 221 + 212 + 211 = 666.

It is not a de Polignac number, because 2011221212211 - 2² = 2011221212207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011221212201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 852934026 + ... + 852936383.

It is an arithmetic number, because the mean of its divisors is an integer number (243939468630).

Almost surely, 2^{2011221212211} is an apocalyptic number.

2011221212211 is a deficient number, since it is larger than the sum of its proper divisors (916052411349).

2011221212211 is a wasteful number, since it uses less digits than its factorization.

2011221212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705870546 (or 1705870543 counting only the distinct ones).

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

Adding to 2011221212211 its reverse (1122121221102), we get a palindrome (3133342433313).

The spelling of 2011221212211 in words is "two trillion, eleven billion, two hundred twenty-one million, two hundred twelve thousand, two hundred eleven".