221101219 has 2 divisors, whose sum is σ = 221101220. Its totient is φ = 221101218.

The previous prime is 221101217. The next prime is 221101247. The reversal of 221101219 is 912101122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221101219 - 2¹ = 221101217 is a prime.

It is a super-2 number, since 2×221101219² = 97771498086571922, which contains 22 as substring.

Together with 221101217, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221101196 and 221101205.

It is not a weakly prime, because it can be changed into another prime (221101211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550609 + 110550610.

It is an arithmetic number, because the mean of its divisors is an integer number (110550610).

Almost surely, 2^221101219 is an apocalyptic number.

221101219 is a deficient number, since it is larger than the sum of its proper divisors (1).

221101219 is an equidigital number, since it uses as much as digits as its factorization.

221101219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 221101219 is about 14869.4727209811. The cubic root of 221101219 is about 604.6866478307.

The spelling of 221101219 in words is "two hundred twenty-one million, one hundred one thousand, two hundred nineteen".