2121122211211 has 8 divisors (see below), whose sum is σ = 2168584326720. Its totient is φ = 2073757256448.

The previous prime is 2121122211199. The next prime is 2121122211217. The reversal of 2121122211211 is 1121122211212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121122211211 - 2¹¹ = 2121122209163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121122211217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24246036 + ... + 24333361.

It is an arithmetic number, because the mean of its divisors is an integer number (271073040840).

Almost surely, 2^{2121122211211} is an apocalyptic number.

2121122211211 is a deficient number, since it is larger than the sum of its proper divisors (47462115509).

2121122211211 is an equidigital number, since it uses as much as digits as its factorization.

2121122211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48580373.

The product of its digits is 64, while the sum is 19.

Adding to 2121122211211 its reverse (1121122211212), we get a palindrome (3242244422423).

Subtracting from 2121122211211 its reverse (1121122211212), we obtain a palindrome (999999999999).

The spelling of 2121122211211 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred eleven".