1222001111 has 2 divisors, whose sum is σ = 1222001112. Its totient is φ = 1222001110.

The previous prime is 1222001107. The next prime is 1222001117. The reversal of 1222001111 is 1111002221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222001111 - 2² = 1222001107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222001092 and 1222001101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222001117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611000555 + 611000556.

It is an arithmetic number, because the mean of its divisors is an integer number (611000556).

Almost surely, 2^1222001111 is an apocalyptic number.

1222001111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222001111 is an equidigital number, since it uses as much as digits as its factorization.

1222001111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1222001111 is about 34957.1324767922. The cubic root of 1222001111 is about 1069.1136313978.

Adding to 1222001111 its reverse (1111002221), we get a palindrome (2333003332).

The spelling of 1222001111 in words is "one billion, two hundred twenty-two million, one thousand, one hundred eleven".