1222112211211 has 4 divisors (see below), whose sum is σ = 1227904212424. Its totient is φ = 1216320210000.

The previous prime is 1222112211109. The next prime is 1222112211277. The reversal of 1222112211211 is 1121122112221.

It is a happy number.

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 1222112211211 - 2¹⁹ = 1222111686923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222112211011) 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, 2896000290 + ... + 2896000711.

It is an arithmetic number, because the mean of its divisors is an integer number (306976053106).

Almost surely, 2^{1222112211211} is an apocalyptic number.

1222112211211 is a deficient number, since it is larger than the sum of its proper divisors (5792001213).

1222112211211 is an equidigital number, since it uses as much as digits as its factorization.

1222112211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5792001212.

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

Adding to 1222112211211 its reverse (1121122112221), we get a palindrome (2343234323432).

The spelling of 1222112211211 in words is "one trillion, two hundred twenty-two billion, one hundred twelve million, two hundred eleven thousand, two hundred eleven".