100221019 has 2 divisors, whose sum is σ = 100221020. Its totient is φ = 100221018.

The previous prime is 100220993. The next prime is 100221073. The reversal of 100221019 is 910122001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100221019 - 2⁹ = 100220507 is a prime.

It is a super-2 number, since 2×100221019² = 20088505298796722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100220993 and 100221011.

It is not a weakly prime, because it can be changed into another prime (100921019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110509 + 50110510.

It is an arithmetic number, because the mean of its divisors is an integer number (50110510).

Almost surely, 2^100221019 is an apocalyptic number.

100221019 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221019 is an equidigital number, since it uses as much as digits as its factorization.

100221019 is an evil number, because the sum of its binary digits is even.

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

The square root of 100221019 is about 10011.0448505638. The cubic root of 100221019 is about 464.5005915123.

The spelling of 100221019 in words is "one hundred million, two hundred twenty-one thousand, nineteen".