221041019 has 2 divisors, whose sum is σ = 221041020. Its totient is φ = 221041018.

The previous prime is 221040979. The next prime is 221041031. The reversal of 221041019 is 910140122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221041019 - 2⁸ = 221040763 is a prime.

It is a super-2 number, since 2×221041019² = 97718264161116722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221041049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110520509 + 110520510.

It is an arithmetic number, because the mean of its divisors is an integer number (110520510).

Almost surely, 2^221041019 is an apocalyptic number.

221041019 is a deficient number, since it is larger than the sum of its proper divisors (1).

221041019 is an equidigital number, since it uses as much as digits as its factorization.

221041019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 221041019 is about 14867.4483015748. The cubic root of 221041019 is about 604.6317628016.

The spelling of 221041019 in words is "two hundred twenty-one million, forty-one thousand, nineteen".