1211222227 has 2 divisors, whose sum is σ = 1211222228. Its totient is φ = 1211222226.

The previous prime is 1211222213. The next prime is 1211222249. The reversal of 1211222227 is 7222221121.

It is an a-pointer prime, because the next prime (1211222249) can be obtained adding 1211222227 to its sum of digits (22).

It is a weak prime.

It is an emirp because it is prime and its reverse (7222221121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211222227 - 2⁷ = 1211222099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211222198 and 1211222207.

It is not a weakly prime, because it can be changed into another prime (1211222267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605611113 + 605611114.

It is an arithmetic number, because the mean of its divisors is an integer number (605611114).

Almost surely, 2^1211222227 is an apocalyptic number.

1211222227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211222227 is an equidigital number, since it uses as much as digits as its factorization.

1211222227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 22.

The square root of 1211222227 is about 34802.6181055391. The cubic root of 1211222227 is about 1065.9609060636.

Adding to 1211222227 its reverse (7222221121), we get a palindrome (8433443348).

The spelling of 1211222227 in words is "one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-seven".