1000221011 has 4 divisors (see below), whose sum is σ = 1000686024. Its totient is φ = 999756000.

The previous prime is 1000221007. The next prime is 1000221017. The reversal of 1000221011 is 1101220001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1101220001 = 7 ⋅157317143.

It is a cyclic number.

It is not a de Polignac number, because 1000221011 - 2² = 1000221007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000221011.

It is not an unprimeable number, because it can be changed into a prime (1000221017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229265 + ... + 233586.

It is an arithmetic number, because the mean of its divisors is an integer number (250171506).

Almost surely, 2^1000221011 is an apocalyptic number.

1000221011 is a deficient number, since it is larger than the sum of its proper divisors (465013).

1000221011 is an equidigital number, since it uses as much as digits as its factorization.

1000221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465012.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1000221011 is about 31626.2708993647. The cubic root of 1000221011 is about 1000.0736649067.

Adding to 1000221011 its reverse (1101220001), we get a palindrome (2101441012).

It can be divided in two parts, 10002 and 21011, that added together give a palindrome (31013).

The spelling of 1000221011 in words is "one billion, two hundred twenty-one thousand, eleven".