1222312277 has 2 divisors, whose sum is σ = 1222312278. Its totient is φ = 1222312276.

The previous prime is 1222312187. The next prime is 1222312319. The reversal of 1222312277 is 7722132221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1212014596 + 10297681 = 34814^2 + 3209^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222312277 - 2¹² = 1222308181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222312477) 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, 611156138 + 611156139.

It is an arithmetic number, because the mean of its divisors is an integer number (611156139).

Almost surely, 2^1222312277 is an apocalyptic number.

It is an amenable number.

1222312277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222312277 is an equidigital number, since it uses as much as digits as its factorization.

1222312277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 29.

The square root of 1222312277 is about 34961.5828732053. The cubic root of 1222312277 is about 1069.2043687893.

Adding to 1222312277 its reverse (7722132221), we get a palindrome (8944444498).

The spelling of 1222312277 in words is "one billion, two hundred twenty-two million, three hundred twelve thousand, two hundred seventy-seven".