1222212100999 has 2 divisors, whose sum is σ = 1222212101000. Its totient is φ = 1222212100998.

The previous prime is 1222212100997. The next prime is 1222212101003. The reversal of 1222212100999 is 9990012122221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222212100999 - 2¹ = 1222212100997 is a prime.

Together with 1222212100997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222212100997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611106050499 + 611106050500.

It is an arithmetic number, because the mean of its divisors is an integer number (611106050500).

Almost surely, 2^{1222212100999} is an apocalyptic number.

1222212100999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222212100999 is an equidigital number, since it uses as much as digits as its factorization.

1222212100999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 1222212100999 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred thousand, nine hundred ninety-nine".