1001222209 has 16 divisors (see below), whose sum is σ = 1087236304. Its totient is φ = 916531200.

The previous prime is 1001222207. The next prime is 1001222227. The reversal of 1001222209 is 9022221001.

1001222209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 134096400 + 867125809 = 11580^2 + 29447^2 .

It is not a de Polignac number, because 1001222209 - 2¹ = 1001222207 is a prime.

It is a super-3 number, since 3×1001222209³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001222207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 980119 + ... + 981139.

It is an arithmetic number, because the mean of its divisors is an integer number (67952269).

Almost surely, 2^1001222209 is an apocalyptic number.

It is an amenable number.

1001222209 is a deficient number, since it is larger than the sum of its proper divisors (86014095).

1001222209 is a wasteful number, since it uses less digits than its factorization.

1001222209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1001222209 is about 31642.0955216307. The cubic root of 1001222209 is about 1000.4072371354.

The spelling of 1001222209 in words is "one billion, one million, two hundred twenty-two thousand, two hundred nine".