2211212122211 has 4 divisors (see below), whose sum is σ = 2211222180672. Its totient is φ = 2211202063752.

The previous prime is 2211212122159. The next prime is 2211212122279. The reversal of 2211212122211 is 1122212121122.

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 2211212122211 - 2¹⁰ = 2211212121187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211212121211) 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 3 ways as a sum of consecutive naturals, for example, 4691936 + ... + 5141661.

It is an arithmetic number, because the mean of its divisors is an integer number (552805545168).

Almost surely, 2^{2211212122211} is an apocalyptic number.

2211212122211 is a deficient number, since it is larger than the sum of its proper divisors (10058461).

2211212122211 is an equidigital number, since it uses as much as digits as its factorization.

2211212122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10058460.

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

Adding to 2211212122211 its reverse (1122212121122), we get a palindrome (3333424243333).

The spelling of 2211212122211 in words is "two trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, two hundred eleven".