22001221109 has 16 divisors (see below), whose sum is σ = 27272681856. Its totient is φ = 17315980800.

The previous prime is 22001221103. The next prime is 22001221129. The reversal of 22001221109 is 90112210022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22001221109 - 2⁸ = 22001220853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001221103) 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, 2249807 + ... + 2259564.

It is an arithmetic number, because the mean of its divisors is an integer number (1704542616).

Almost surely, 2^22001221109 is an apocalyptic number.

It is an amenable number.

22001221109 is a deficient number, since it is larger than the sum of its proper divisors (5271460747).

22001221109 is a wasteful number, since it uses less digits than its factorization.

22001221109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509436.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 22001221109 in words is "twenty-two billion, one million, two hundred twenty-one thousand, one hundred nine".