1222122511 has 2 divisors, whose sum is σ = 1222122512. Its totient is φ = 1222122510.

The previous prime is 1222122463. The next prime is 1222122527. The reversal of 1222122511 is 1152212221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222122511 - 2¹³ = 1222114319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222122211) 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, 611061255 + 611061256.

It is an arithmetic number, because the mean of its divisors is an integer number (611061256).

Almost surely, 2^1222122511 is an apocalyptic number.

1222122511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222122511 is an equidigital number, since it uses as much as digits as its factorization.

1222122511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160, while the sum is 19.

The square root of 1222122511 is about 34958.8688461169. The cubic root of 1222122511 is about 1069.1490340108.

Adding to 1222122511 its reverse (1152212221), we get a palindrome (2374334732).

The spelling of 1222122511 in words is "one billion, two hundred twenty-two million, one hundred twenty-two thousand, five hundred eleven".