22112002009 has 4 divisors (see below), whose sum is σ = 22127696820. Its totient is φ = 22096307200.

The previous prime is 22112001991. The next prime is 22112002021. The reversal of 22112002009 is 90020021122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5324912784 + 16787089225 = 72972^2 + 129565^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112002009 - 2⁹ = 22112001497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22112002109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7845292 + ... + 7848109.

It is an arithmetic number, because the mean of its divisors is an integer number (5531924205).

Almost surely, 2^22112002009 is an apocalyptic number.

It is an amenable number.

22112002009 is a deficient number, since it is larger than the sum of its proper divisors (15694811).

22112002009 is a wasteful number, since it uses less digits than its factorization.

22112002009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15694810.

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

The spelling of 22112002009 in words is "twenty-two billion, one hundred twelve million, two thousand, nine".