12012021109 has 8 divisors (see below), whose sum is σ = 13874848128. Its totient is φ = 10277664960.

The previous prime is 12012021107. The next prime is 12012021113. The reversal of 12012021109 is 90112021021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12012021109 - 2¹ = 12012021107 is a prime.

It is a super-2 number, since 2×12012021109² (a number of 21 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 (12012021107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32117517 + ... + 32117890.

It is an arithmetic number, because the mean of its divisors is an integer number (1734356016).

Almost surely, 2^12012021109 is an apocalyptic number.

It is an amenable number.

12012021109 is a deficient number, since it is larger than the sum of its proper divisors (1862827019).

12012021109 is a wasteful number, since it uses less digits than its factorization.

12012021109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64235435.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 12012021109 in words is "twelve billion, twelve million, twenty-one thousand, one hundred nine".