1001220019 has 2 divisors, whose sum is σ = 1001220020. Its totient is φ = 1001220018.

The previous prime is 1001220013. The next prime is 1001220043. The reversal of 1001220019 is 9100221001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001220019 - 2⁵ = 1001219987 is a prime.

It is a super-2 number, since 2×1001220019² = 2004883052892720722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001219984 and 1001220011.

It is not a weakly prime, because it can be changed into another prime (1001220013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610009 + 500610010.

It is an arithmetic number, because the mean of its divisors is an integer number (500610010).

Almost surely, 2^1001220019 is an apocalyptic number.

1001220019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001220019 is an equidigital number, since it uses as much as digits as its factorization.

1001220019 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 1001220019 is about 31642.0609158127. The cubic root of 1001220019 is about 1000.4065077291.

The spelling of 1001220019 in words is "one billion, one million, two hundred twenty thousand, nineteen".