1211211122227 has 2 divisors, whose sum is σ = 1211211122228. Its totient is φ = 1211211122226.

The previous prime is 1211211122201. The next prime is 1211211122239. The reversal of 1211211122227 is 7222211121121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211211122227 - 2³¹ = 1209063638579 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211211122267) 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 as a sum of consecutive naturals, namely, 605605561113 + 605605561114.

It is an arithmetic number, because the mean of its divisors is an integer number (605605561114).

Almost surely, 2^{1211211122227} is an apocalyptic number.

1211211122227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211211122227 is an equidigital number, since it uses as much as digits as its factorization.

1211211122227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 25.

Adding to 1211211122227 its reverse (7222211121121), we get a palindrome (8433422243348).

The spelling of 1211211122227 in words is "one trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty-seven".