1222111201 has 2 divisors, whose sum is σ = 1222111202. Its totient is φ = 1222111200.

The previous prime is 1222111169. The next prime is 1222111207. The reversal of 1222111201 is 1021112221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1146838225 + 75272976 = 33865^2 + 8676^2 .

It is an emirp because it is prime and its reverse (1021112221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222111201 - 2⁵ = 1222111169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222111207) 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 as a sum of consecutive naturals, namely, 611055600 + 611055601.

It is an arithmetic number, because the mean of its divisors is an integer number (611055601).

Almost surely, 2^1222111201 is an apocalyptic number.

It is an amenable number.

1222111201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222111201 is an equidigital number, since it uses as much as digits as its factorization.

1222111201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1222111201 is about 34958.7070842158. The cubic root of 1222111201 is about 1069.1457358927.

Adding to 1222111201 its reverse (1021112221), we get a palindrome (2243223422).

The spelling of 1222111201 in words is "one billion, two hundred twenty-two million, one hundred eleven thousand, two hundred one".