221100019 has 8 divisors (see below), whose sum is σ = 253325408. Its totient is φ = 189034560.

The previous prime is 221099999. The next prime is 221100037. The reversal of 221100019 is 910001122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221100019 - 2⁵ = 221099987 is a prime.

It is a super-2 number, since 2×221100019² = 97770436803600722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221099975 and 221100011.

It is not an unprimeable number, because it can be changed into a prime (221100059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37002 + ... + 42559.

It is an arithmetic number, because the mean of its divisors is an integer number (31665676).

Almost surely, 2^221100019 is an apocalyptic number.

221100019 is a deficient number, since it is larger than the sum of its proper divisors (32225389).

221100019 is an equidigital number, since it uses as much as digits as its factorization.

221100019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79965.

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

The square root of 221100019 is about 14869.4323697981. The cubic root of 221100019 is about 604.6855538743.

The spelling of 221100019 in words is "two hundred twenty-one million, one hundred thousand, nineteen".