221210419 has 2 divisors, whose sum is σ = 221210420. Its totient is φ = 221210418.

The previous prime is 221210413. The next prime is 221210449. The reversal of 221210419 is 914012122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221210419 - 2⁵ = 221210387 is a prime.

It is a super-2 number, since 2×221210419² = 97868098948311122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221210419.

It is not a weakly prime, because it can be changed into another prime (221210413) 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, 110605209 + 110605210.

It is an arithmetic number, because the mean of its divisors is an integer number (110605210).

Almost surely, 2^221210419 is an apocalyptic number.

221210419 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210419 is an equidigital number, since it uses as much as digits as its factorization.

221210419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 221210419 is about 14873.1442203725. The cubic root of 221210419 is about 604.7861812998.

The spelling of 221210419 in words is "two hundred twenty-one million, two hundred ten thousand, four hundred nineteen".