1001220018 has 32 divisors (see below), whose sum is σ = 2014372800. Its totient is φ = 331758336.

The previous prime is 1001220013. The next prime is 1001220019. The reversal of 1001220018 is 8100221001.

It is a junction number, because it is equal to n+sod(n) for n = 1001219979 and 1001220006.

It is not an unprimeable number, because it can be changed into a prime (1001220013) 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 15 ways as a sum of consecutive naturals, for example, 1237198 + ... + 1238006.

It is an arithmetic number, because the mean of its divisors is an integer number (62949150).

Almost surely, 2^1001220018 is an apocalyptic number.

1001220018 is an abundant number, since it is smaller than the sum of its proper divisors (1013152782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001220018 is a wasteful number, since it uses less digits than its factorization.

1001220018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1001220018 is about 31642.0609000109. The cubic root of 1001220018 is about 1000.4065073960.

Adding to 1001220018 its reverse (8100221001), we get a palindrome (9101441019).

The spelling of 1001220018 in words is "one billion, one million, two hundred twenty thousand, eighteen".