1222212122009 has 2 divisors, whose sum is σ = 1222212122010. Its totient is φ = 1222212122008.

The previous prime is 1222212121957. The next prime is 1222212122077. The reversal of 1222212122009 is 9002212122221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1114872015625 + 107340106384 = 1055875^2 + 327628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222212122009 - 2¹² = 1222212117913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222212122099) 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, 611106061004 + 611106061005.

It is an arithmetic number, because the mean of its divisors is an integer number (611106061005).

Almost surely, 2^{1222212122009} is an apocalyptic number.

It is an amenable number.

1222212122009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222212122009 is an equidigital number, since it uses as much as digits as its factorization.

1222212122009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 1222212122009 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred twenty-two thousand, nine".