12012222121 has 8 divisors (see below), whose sum is σ = 12536415360. Its totient is φ = 11488189152.

The previous prime is 12012222119. The next prime is 12012222127. The reversal of 12012222121 is 12122221021.

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 12012222121 - 2¹ = 12012222119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012222095 and 12012222104.

It is not an unprimeable number, because it can be changed into a prime (12012222127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128181 + ... + 201133.

It is an arithmetic number, because the mean of its divisors is an integer number (1567051920).

Almost surely, 2^12012222121 is an apocalyptic number.

It is an amenable number.

12012222121 is a deficient number, since it is larger than the sum of its proper divisors (524193239).

12012222121 is an equidigital number, since it uses as much as digits as its factorization.

12012222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80135.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12012222121 its reverse (12122221021), we get a palindrome (24134443142).

The spelling of 12012222121 in words is "twelve billion, twelve million, two hundred twenty-two thousand, one hundred twenty-one".