211231219 has 2 divisors, whose sum is σ = 211231220. Its totient is φ = 211231218.

The previous prime is 211231199. The next prime is 211231271. The reversal of 211231219 is 912132112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211231219 - 2⁷ = 211231091 is a prime.

It is a super-2 number, since 2×211231219² = 89237255760451922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211231219.

It is not a weakly prime, because it can be changed into another prime (211231289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105615609 + 105615610.

It is an arithmetic number, because the mean of its divisors is an integer number (105615610).

Almost surely, 2^211231219 is an apocalyptic number.

211231219 is a deficient number, since it is larger than the sum of its proper divisors (1).

211231219 is an equidigital number, since it uses as much as digits as its factorization.

211231219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 211231219 is about 14533.7957533467. The cubic root of 211231219 is about 595.5515625519.

The spelling of 211231219 in words is "two hundred eleven million, two hundred thirty-one thousand, two hundred nineteen".