2112221232109 has 16 divisors (see below), whose sum is σ = 2135101731840. Its totient is φ = 2089417200640.

The previous prime is 2112221232101. The next prime is 2112221232139. The reversal of 2112221232109 is 9012321222112.

It is a cyclic number.

It is not a de Polignac number, because 2112221232109 - 2³ = 2112221232101 is a prime.

It is a super-2 number, since 2×2112221232109² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112221232101) 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, 215726004 + ... + 215735794.

It is an arithmetic number, because the mean of its divisors is an integer number (133443858240).

Almost surely, 2^{2112221232109} is an apocalyptic number.

It is an amenable number.

2112221232109 is a deficient number, since it is larger than the sum of its proper divisors (22880499731).

2112221232109 is a wasteful number, since it uses less digits than its factorization.

2112221232109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13460.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 2112221232109 in words is "two trillion, one hundred twelve billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred nine".