1228205119 has 2 divisors, whose sum is σ = 1228205120. Its totient is φ = 1228205118.

The previous prime is 1228205117. The next prime is 1228205141. The reversal of 1228205119 is 9115028221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1228205119 - 2¹ = 1228205117 is a prime.

It is a super-2 number, since 2×1228205119² = 3016975628675608322, which contains 22 as substring.

Together with 1228205117, 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 (1228205113) 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, 614102559 + 614102560.

It is an arithmetic number, because the mean of its divisors is an integer number (614102560).

Almost surely, 2^1228205119 is an apocalyptic number.

1228205119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228205119 is an equidigital number, since it uses as much as digits as its factorization.

1228205119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1228205119 is about 35045.7575035838. The cubic root of 1228205119 is about 1070.9198480726.

The spelling of 1228205119 in words is "one billion, two hundred twenty-eight million, two hundred five thousand, one hundred nineteen".