221051219 has 2 divisors, whose sum is σ = 221051220. Its totient is φ = 221051218.

The previous prime is 221051191. The next prime is 221051267. The reversal of 221051219 is 912150122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221051219 is a prime.

It is a super-2 number, since 2×221051219² = 97727282842771922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221051194 and 221051203.

It is not a weakly prime, because it can be changed into another prime (221051279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110525609 + 110525610.

It is an arithmetic number, because the mean of its divisors is an integer number (110525610).

Almost surely, 2^221051219 is an apocalyptic number.

221051219 is a deficient number, since it is larger than the sum of its proper divisors (1).

221051219 is an equidigital number, since it uses as much as digits as its factorization.

221051219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 221051219 is about 14867.7913289096. The cubic root of 221051219 is about 604.6410629595.

The spelling of 221051219 in words is "two hundred twenty-one million, fifty-one thousand, two hundred nineteen".