1222126999 has 2 divisors, whose sum is σ = 1222127000. Its totient is φ = 1222126998.

The previous prime is 1222126993. The next prime is 1222127017. The reversal of 1222126999 is 9996212221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222126999 - 2⁹ = 1222126487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222126993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611063499 + 611063500.

It is an arithmetic number, because the mean of its divisors is an integer number (611063500).

Almost surely, 2^1222126999 is an apocalyptic number.

1222126999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222126999 is an equidigital number, since it uses as much as digits as its factorization.

1222126999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 1222126999 is about 34958.9330357779. The cubic root of 1222126999 is about 1069.1503427544.

The spelling of 1222126999 in words is "one billion, two hundred twenty-two million, one hundred twenty-six thousand, nine hundred ninety-nine".