126221219 has 2 divisors, whose sum is σ = 126221220. Its totient is φ = 126221218.

The previous prime is 126221203. The next prime is 126221257. The reversal of 126221219 is 912122621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126221219 - 2⁴ = 126221203 is a prime.

It is a super-2 number, since 2×126221219² = 31863592251691922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126221279) 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, 63110609 + 63110610.

It is an arithmetic number, because the mean of its divisors is an integer number (63110610).

Almost surely, 2^126221219 is an apocalyptic number.

126221219 is a deficient number, since it is larger than the sum of its proper divisors (1).

126221219 is an equidigital number, since it uses as much as digits as its factorization.

126221219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 126221219 is about 11234.8217164315. The cubic root of 126221219 is about 501.6230179252.

The spelling of 126221219 in words is "one hundred twenty-six million, two hundred twenty-one thousand, two hundred nineteen".