221010019 has 4 divisors (see below), whose sum is σ = 224308744. Its totient is φ = 217711296.

The previous prime is 221010011. The next prime is 221010037. The reversal of 221010019 is 910010122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221010019 - 2³ = 221010011 is a prime.

It is a super-2 number, since 2×221010019² = 97690856996760722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221009984 and 221010011.

It is not an unprimeable number, because it can be changed into a prime (221010011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1649262 + ... + 1649395.

It is an arithmetic number, because the mean of its divisors is an integer number (56077186).

Almost surely, 2^221010019 is an apocalyptic number.

221010019 is a deficient number, since it is larger than the sum of its proper divisors (3298725).

221010019 is an equidigital number, since it uses as much as digits as its factorization.

221010019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298724.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 221010019 is about 14866.4057189356. The cubic root of 221010019 is about 604.6034958597.

The spelling of 221010019 in words is "two hundred twenty-one million, ten thousand, nineteen".