2121112212211 has 2 divisors, whose sum is σ = 2121112212212.
Its totient is φ = 2121112212210.
The previous prime is 2121112212203. The next prime is 2121112212361. The reversal of 2121112212211 is 1122122111212.
Adding to 2121112212211 its reverse (1122122111212), we get a palindrome (3243234323423).
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 2121112212211 - 23 = 2121112212203 is a prime.
It is not a weakly prime, because it can be changed into another prime (2121112213211) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060556106105 + 1060556106106.
It is an arithmetic number, because the mean of its divisors is an integer number (1060556106106).
Almost surely, 22121112212211 is an apocalyptic number.
2121112212211 is a deficient number, since it is larger than the sum of its proper divisors (1).
2121112212211 is an equidigital number, since it uses as much as digits as its factorization.
2121112212211 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 64, while the sum is 19.
The spelling of 2121112212211 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, two hundred eleven".