1220222129011 has 2 divisors, whose sum is σ = 1220222129012. Its totient is φ = 1220222129010.

The previous prime is 1220222128997. The next prime is 1220222129051. The reversal of 1220222129011 is 1109212220221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220222129011 - 2⁷ = 1220222128883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220222129051) 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, 610111064505 + 610111064506.

It is an arithmetic number, because the mean of its divisors is an integer number (610111064506).

Almost surely, 2^{1220222129011} is an apocalyptic number.

1220222129011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220222129011 is an equidigital number, since it uses as much as digits as its factorization.

1220222129011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 1220222129011 its reverse (1109212220221), we get a palindrome (2329434349232).

The spelling of 1220222129011 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred twenty-nine thousand, eleven".