2011001221211 has 16 divisors (see below), whose sum is σ = 2135137459680. Its totient is φ = 1887517416960.

The previous prime is 2011001221181. The next prime is 2011001221231. The reversal of 2011001221211 is 1121221001102.

It is a cyclic number.

It is not a de Polignac number, because 2011001221211 - 2¹⁰ = 2011001220187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011001221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19967900 + ... + 20068358.

It is an arithmetic number, because the mean of its divisors is an integer number (133446091230).

Almost surely, 2^{2011001221211} is an apocalyptic number.

2011001221211 is a deficient number, since it is larger than the sum of its proper divisors (124136238469).

2011001221211 is a wasteful number, since it uses less digits than its factorization.

2011001221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103694.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011001221211 its reverse (1121221001102), we get a palindrome (3132222222313).

The spelling of 2011001221211 in words is "two trillion, eleven billion, one million, two hundred twenty-one thousand, two hundred eleven".