1212211110211 has 4 divisors (see below), whose sum is σ = 1212282944800. Its totient is φ = 1212139275624.

The previous prime is 1212211110139. The next prime is 1212211110259. The reversal of 1212211110211 is 1120111122121.

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 1212211110211 - 2²⁵ = 1212177555779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212211111211) 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 3 ways as a sum of consecutive naturals, for example, 35891976 + ... + 35925733.

It is an arithmetic number, because the mean of its divisors is an integer number (303070736200).

Almost surely, 2^{1212211110211} is an apocalyptic number.

1212211110211 is a deficient number, since it is larger than the sum of its proper divisors (71834589).

1212211110211 is an equidigital number, since it uses as much as digits as its factorization.

1212211110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71834588.

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

Adding to 1212211110211 its reverse (1120111122121), we get a palindrome (2332322232332).

The spelling of 1212211110211 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred ten thousand, two hundred eleven".